STEM resources hubs for STEM toys

How to make science toys for kids

Whether you are looking for insanely cool science toys for kids in kindergarten/elementary schools or you need a list of go-to science supplies, these DIY STEM educational toys have you covered. 
Next, let us sort out some simple and interesting science toys. involving physics, chemistry, biology, astronomy and geography, and different outdoor subjects, which are very suitable for children in kindergartens and elementary schools(4-8 year olds ).
1. Heart And Lung Experiment 
2. The Sound of Heart
3. Windmill
4. Earth Moon Sun Model
5. Music Box
6. Cosmic Rocket Experiment
7. Salt Water Clock
8. Star Projector
9. Rubber Band Airplane
10. Microscope Experiment

1.Heart and Lung Experiment

People's life is inseparable from breathing. Breathing includes two processes: exhalation and inhalation. The handmade heart and lung model can help children better understand the process of breathing.
The kits include bottles, balloons, rubber bands, double-sided tapes, etc. Under the guidance of teachers or parents, they can make a science model by themsevles.
Heart And Lung Experiment

2.Heart Sounds

In this science activity, kids experiment with a stethoscope.We can find a heart-function stethoscope, and it can provide hours of exploration and fun. A stethoscope is a tool used by both veterinarians and doctors to listen to sounds coming from inside of the body of an animal or person, such as breathing, heart beats and digestion. The stethoscope need to assembled by kids and then they listen their heart sounds,pulse etc. It's an easy elementary science experiments for kids.
stethoscope

3.Windmill

Windmill makes very easy and the materials are easy to get around us. Here is a windmill tutorial: How to make a windmill . In this video, we can know how to make a paper pinwheel easy. It’s an amazing DIY science toy and DIY tutorial for kids.

f it is made by little children, we can refer to below windmill material, they are made of plastic and easier to assemble.

DIY Windmill

4.Earth Moon Sun model

Astronomy for kids can be so much fun. Learn about the relationship between the Sun, Moon, and Earth by doing these simple investigations. Learn about how the Earth rotates and model how lunar and solar eclipses occur. 

Here are some other earth moon and sun models for reference.

earth moon sun system

5. Music Box

Create a kid's own music box by placing and pushing pieces together. When painting the music box, each 3D wooden music box stands out with vibrant colors, while playing beautiful music. It's a fun DIY science activity for all of the kids.
DIY music box for kids

6.Cosmic Rocket Experiment

All you need is your Cosmic Rocket kit and some vinegar and baking soda, then prepare yourself for an experiment unlike any other where physics and chemistry combine for a big bang! It’s the perfect way to learn and have heaps of fun at the same time. After all, everyone loves a good lift off.
A working rocket that’s powered by vinegar and baking soda.
Basic Chemistry Kit Cosmic Rocket Experiment

7.Salt Water Clock

The salt water clock does not require a battery at all. As long as the cup on the back of the clock is filled with water, the time and date can be clearly displayed. This clock keeps accurate time using energy from a battery that you make.
Salt Water Clock

8.Star Projector

Star light projector is cool science kit for kids to put the universe back home, to watch star fly around their room to satisfy their curiosity of universal astronomical science. In addition, Kids can discover a variety of constellations and learn about different constellation shapes and knowledge . It is a particularly good astronomy scientific experiment toy.
Star River Light

9.Rubber Band Airplane

Learn about aeronautics and physics with our Rubber Band Aeroplanes(Here is another simple rubber band airplane)! With a twist of the propeller, the attached rubber band twists tight building tension until you are ready for flight, toss the Aeroplane into the air and watch it fly. Planes include easy to follow instructions, and the rubber band is hidden inside the fuselage. Students could try out different activities with the Aeroplane, two rubber bands, landing gear and a display stand. Made of foam. For ages 14 and up.

Rubber band airplane

10.Microscope Experiment

Curiosity accelerates our learning whether you are a young child, student or microscopy hobbyist. There are a number of reasons as to why curiosity among children, in particular, should be encouraged.
By encouraging their curiosity, children will continue to learn especially in those areas of interest, but also develop an interest in a wide variety of fields of study, greatly adding to what they grasp in school.
Microscope for Kids

5 Best Earth Moon and Sun Models for Students

The Earth, Moon and Sun STEM Education program provides hands-on and enquiry based learning activities to help students understand the day-night cycle, seasons and the phases of the moon.

We put different earth moon and sun kits together to make this list for STEM curriculum. And this article will help teachers find the right kits more easily.

1, Plywood Earth Moon and Sun Model

This is a simple hand-made 3D model. Students can build a earth, moon and sun kit to understand how they run. The kit contains basswood plywood, screws, foam balls, rubber bands, etc. And we can bring our own colored pens to color the model. But it does not enrich the knowledge of the sun and the earth, and needs to cooperate with the teacher’s explanation.

This model is simple and suitable for students to make by themselves and it’s the lowest price and best seller in the market.

earth moon sun system

2,Electric earth moon and sun model

Students will practice fine motor skills to build a Sun-Earth-Moon mobile and use it to describe the relative movement of the three objects,and identify some of the differing characteristics of the Sun, Earth and Moon.

The kit contains basswood plywood, battery box, wires, foam balls, motors, etc. We can follow the instructions to make this model. However, the assembly of this model is a bit complicated and needs to be completed under the guidance of the teacher.

Earth moon and sun model

3,Plastic earth moon and sun kit

It’s a handmade science kit and the kit contains plastic parts, screws, foam balls, rubber band, etc. Usually, we are using it in ​schools, classrooms, and home science, etc. Children can follow the instructions to make this model and illuminate three planets with a flashlight to observe the influence of the moon on the earth.

This model is economical and interesting to operate.

earth moon sun system

4, Sun Earth Moon Orbital Planetarium toy

The earth moon sun planetarium DIY model is made of  plastic material and specially designed for scientific experiments. It’s an intuitive teaching model that can vividly depict the relative movement between the earth, the moon, and the sun. Let Kids understand the earth, the moon, the sun movement rules.

Its wholesale price is similar to item 1. But the retail price is very expensive, so consumers feel that the product is not worth it.

Sun Earth Moon Orbital Planetarium Model

5,Illuminated Sun, Earth & Moon Orbital Model

This three dimensional model represents the earth’s changing position with regard to the sun and the moon. Model features a 5.9″ diameter sun, 4″ diameter earth and a 1″ diameter moon. Both the earth and the moon are situated on metal rods, and can be moved to show relative motion and position.It’s  equipped with a 12V bulb that is located inside of the sun to show the effect that sunlight has on the earth and the moon. Requires two AA batteries.

But the retail price is very high and not affordable for most people.

Illuminated Sun, Earth & Moon Orbital Model

6, Professional earth moon and sun model

This earth moon and sun model allows students to study the motion of the Earth and Moon around the sun and demonstrates the science behind phenomena such as seasons, phases of the moon, eclipses, and tides. It’s a professional model and designed exactly as the knowledge.

The Earth can be manually moved to show its rotation around the Sun. And the Moon can be moved to show its rotation around the Earth. The Sun has a bulb inside which demonstrates the effect that sunlight has on the Earth and Moon.

This model has the same functions as Item 5, and the retail price is about $50. 

Earth moon and sun model

8+ business tips when SOURCING SCIENCE TOYS from China suppliers

Sourcing science toys tips

Science toys like STEM education and STEM activities is engages students and equips them with critical thinking, problem-solving, creative, and collaborative skills. STEM Kits are not only educational toys,but also being excellent teaching resources. It is widely used in learning centers, home science, etc.

In this article, I will share some import business tips based on our ten-year experience. These tips will definitely make sourcing easy for you. And you’ll be able to go without making any mistakes.

 

Next we will read the following 

  1. Where to buy science toys wholesales
  2. How to verify supplier?
  3. Ask for their catalog
  4. Check Price – to match the quality
  5. Communicate all the details clearly
  6. How do you choose shipping method for science toys?
  7. Can you buy Copyright items or Not?
  8. Sign the NDA when customizing the toys

 

1.Where to buy science toys wholesales

1.1 Sourcing from B2B platforms

Alibaba hosts the largest B2B (Alibaba.com), It connects businesses to global manufacturers. Using Alibaba, a buyer can find suppliers to create various bulk educational toys and import them into their country.

Alibaba

Alibaba

We can also choose online sourcing platforms such as Global Sources and Made in China, which can find science toy suppliers in China.

Even if you need to source science toys from India, you can go Indiamart.  It’s a famous B2B platform in India.

 

1.2.Toys exhibition/fair

Most buyers who are running the import business used to visit the toys fair to find suppliers directly. It is easy to check the science toys showroom at the fair. Because there are few suppliers focusing on STEM business, but we are still easy to find many companies have STEM toys. Moreover, we can also touch the samples to know the quality.

But the exhibition time is only 2 to 3 days, our exhibition time is very short. In addition, the samples at the exhibition are also limited, and not all products can be seen. (Some exhibitions are only open twice a year, and each supplier will get limited samples to display at the booth.)

Toys Fair

Toys Fair

1.3 Local wholesale market

Yiwu market contains nearly 40,000 shops, it’s the biggest wholesale market in China, wholesaling almost all of the toys you can think of. Although there are few professional manufacturers of STEM toys, but we can still find many kinds of toys we need.

 

1.4 Google keywords searching

Searching the keywords like education toys manufacturer, STEM toys factory, science toys wholesales, etc, we will find many treasures here. Although there are many suppliers on B2B platform, homogeneous products are serious and the supplier’s levels are uneven. The manufacturers who have their own websites will have clear businesses goals, they are more professional and reliable. We can pay more attention to them.

 

2.How to verify supplier?

The supplier can be required to provide a business license.If your supplier is in China, ask the supplier for the registration documents of the company/factory (documents of the company from China will be in Chinese) Below is a picture for reference.

business license

business license

 

3.Ask for their catalog

Using the above methods, we can find various kinds of science toys, but many products have serious homogeneity and uneven quality. We can ask suppliers to provide catalog. Not only can we find many unique STEM toys, but we can also analyze the level of suppliers. Science toys catalog makes it easier for us to find suitable products, such as cool science toys, girls science toys, science lab toys, science toys for teenagers etc.

STEM toys Catalog

STEM toys catalog

 

4.Check Price – to match the quality

As a buyer, we may have thousands of ways to negotiate the price with the supplier; but the best price is not the lowest price; it’s the reasonable price.China’s production industry has a long history and professional system, so most products come with quite a competitive cost.

Every toy has over ten production units. They look the same but actually not. So, there would also be not much difference in their wholesale prices.

1.1 If the supplier gives a higher quote to you, they may lose business. So you just need to find a suitable price to match the quality you want.

1.2 When you enter the educational toy business, you should have done much research for the corresponding industry. You must know the market and cost very well. If any supplier offers you a much lower quote than the market price, you need to be careful.

 

5.Confirm all the details clearly

When sourcing in China, India or other countries, one must keep in mind we may have to face language and ambiguity of understanding. Many of the problems between suppliers and purchasers can be traced back due to miscommunication or ignore confirmation of all details .

To avoid misunderstanding, all your product specifications, from the Quality requirement, Color requirement, packaging and labelling requirement to delivery time, should be in writing ,and then ask for the quotation.

product details

product details

 

6.How do you choose shipping method for science toys?

After confirming the product style and quantity, we can ask the supplier to calculate the freight cost. So what kind of shipping method is suitable for science toys? It is determined by delivery time and cost.

 

Air freight is the fastest, and there are three ways.
1.1 Express delivery. like DHL, FedEX, UPSetc. It can be delivered anywhere in only 3-7 days, but the delivery cost is expensive. So  it’s suitable for delivery samples, urgent&important products and high value products.

1.2 Air. It’s let the forwarder book the space from the airline, when the cargo arrived the destination airport,the buyers need to do customs clearance and arranging local transportation themeselves. Air is suitable for urgent and large-volume goods, the price is cheaper than express delivery, but the delivery time is a bit longer.

1.3 Air+Local UPS delivery(FBA service). FBA is a shipping method following Amazon,where there is a Amazon, there will be FBA service. At first, the forwarders delivery the goods to the destination airport, and then they cleared the customs by himselves. After the customs clearance is completed, it is responsible for delivering the goods to the Amazon warehouse.

As it develops,then it can be delivered to a private address. Through this method, forwarders will arrange customs clearance, and the buyer does not need to prepare any documents and does not need to pay any duties. The price is relatively cheap, and the delivery time is about 10-18 days. This method is suitable for small and medium volume shipment. What’s more, it’s didn’t request any certifications for buyer, forwarders will do it by themselves.

Air FBA Service

Air FBA Service

Sea is the most economical shipping method

2.1 Sea+Local UPS delivery(FBA service). FBA also has ocean shipping services, but the first voyage is ocean shipping. The delivery time is about 30-50 days, and different ship owners have different delivery times. Generally suitable for small and medium volume of shipment, If the shipment weight is below 1500kg, it’s the best choice. it’s didn’t request any certifications or duties for buyer, forwarders will do it by themselves.But the peak season is prone to delays, the general delay rate is about 30% and the delay about 1-3 weeks.

2.2 traditional sea. If the shipment is more than 1000kg, traditional sea transportation may have more advantages. The greater the weight, the lower the average cost. But we need to prepare customs clearance documents, customs duties, certificates and local delivery.

 

Transport Notes

1,Electricity, magnetism, motors, solar panels, powders, and liquids are all sensitive goods and lots of science kits will have them. Shipping costs are higher than ordinary toys. Air freight is suitable for delivering samples and bulk cargo by sea. Professional science toys suppliers generally give reasonable advice about it.

2.Science toys generally require different certifications and they are volume weight. Small and medium volume shipment are very suitable by sea+ local delivery.

 

7.Can you buy Copyright items or Not?

We know that if the toys comes from a reputable brand, it will be much easier to sell it and get a higher profit. So don’t forget to ask the science toys supplier, “do you have a copyrighted science toys?” they may send you some photo with copyright design and say, “we can produce it, but we do not have a license?”

Now the question is, should you buy such a product?

The answer is, “NO.”the buyer has to get the original company authorization to sell those products as well. If they don’t get the company authorization, they have to face their country’s customs while importing the goods.

 

8.Sign the NDA when customizing the toys

Why are they selling the products we developed?
Why are there so many homogenized products on the market?
The above things happen every day. Because a lot of buyers ignore the importance of confidentiality agreements. If we want to create a new science toys, science activities, or STEM projects, we must sign a the NDA(Non-disclosure agreement)with the supplier. If the new product is very good and no confidentiality agreement is signed, the supplier is likely to recommend its product to other buyers to obtain greater profits.We will lose the ownership of this unique science toys.

 

 

 

 

How to find kid’s subscription box manufacturers?

 

What is a subscription box for kids?

The subscription box for kids is created as various specific needs&interests of the kid’s audience, it’s usually being a series of box kits and sent to the users at a frequency of weeks or months. a kid subscription box is also called the kid craft monthly box, kid craft monthly box, monthly activity box, etc.

In addition to the actual goods, children can also get an extra sense of expectation and value.

Surprise. the boxes are sent regularly but the children didn’t know what mysterious gift was in the box. Surprises will stimulate children’s anticipation and excitement.

Discover. Compared with common toys, the scope of subscription boxes is very wide, and many kits are rarely seen by children. it can inspire children’s enthusiasm for exploration.

 

How are the subscription box for kids look like?

Kiwico Box
Kiwico Box

KiwiCo is a STEM subscription box for kids. Inspire young innovators with monthly hands-on educational projects. The flexibility of KiwiCo’s subscription box offerings means you can find great activities for all ages, their materials are quite good. It’s one of the most popular companies in the world.

Mel Science
Mel Science

MEL Science subscription box sends one science project per month, with an AR lesson to go along with it, accessible through the coordinating app. This fun subscription gives kids all the materials they need to build a simple project, and the opportunity to learn through play. Their materials are quite good and same level as KiwiCo.

little passports
little passports

Little Passports’ box is more diversified, it uses play to help children explore far-off nations, make rockets, or extract DNA, etc. These exploratory activities are a great option for kids who has an explorer’s heart, so we can investigate alongside kids. The box will have activities, recipes, puzzles, souvenirs, STEM experiments, etc.

 

Where to find kid’s subscription box manufacturers?

Due to the many materials involved in children’s subscription boxes, few suppliers can provide all raw materials. If the manufacturer does not have good raw material suppliers or no experience in DIY craft experience, it is difficult to develop the kids’ subscription box.

We can introduce some places to find the manufacturers.

  • B2B Platforms. like Alibaba, Global Sources, India Mart, etc.
  • Exhibition(examples in China). Toy exhibition like Canton Fair, HK Toys Fair.
  • Toys Market.
  • #1 Yiwu Toys Wholesale Market
    #2 Shantou China Toys Market
    #3 Nansantiao Jinzheng Toys Market
    #4 Yangjiang Wutinglong international Toys & Gift City
    #5 Baigou Plush Toys wholesale market
    #6 Yunhe Wooden Toys market
    #7 Zhengzhou Toys wholesale market
    #8 Guangzhou Toys Wholesale market

There are many showrooms in the market. We could find suitable manufacturers there.

  • Google keywords searching.  Searching the keywords like subscription box manufacturer, monthly box factory, activity box manufacturer, etc, we will find many treasures here. Although there are many suppliers on B2B platform, homogeneous products are serious and the supplier’s levels are uneven. The manufacturers who have their own websites will have clear businesses goals, they are more professional and reliable. We can pay more attention to them.

 

What kind of manufacturers is suitable for a subscription box?

We can find some potential suppliers easily, but not all suppliers can do a good job. Why?

It is determined by the complexity of materials for the kid’s subscription boxes. Many materials are easily purchased from the market, but most of the time, they are not suitable and need to be tested and adjust repeatedly.

An excellent manufacturer can not only get all materials but also find problems and provide solutions and suggestions in the proofing process. they are able to develop the box with the buyer together.

STEM kit materials
STEM kit materials

The following points will help us to choose professional kids subscription box manufacturers

1. Main products: If the supplier’s main product is very clear, and it is easy for customers to know what business they are doing. then we can know that they have a clear positioning of their business, and they should be very professional in this product. Because they are deeply running in this industry and understand the market and customer needs very well.

2. Customization cases: Let the supplier provide some similar subscription box cases and make an

introduction. We can also request videos or pictures, etc, or ask about the content of their case,  it’s a good

way to help us understand the market situation too.

3. Professional Questions: We ask some customization questions, such as what problems often occur in kids’ subscription box customization and how to solve them. Can the production process meet our customized needs, if not, is there a good solution? Through some communication, we can roughly judge whether they are professional and reliable.

4. Verify supplier identity: The supplier can be required to provide a business license.If your supplier is in China. Ask the supplier for the registration documents of the company/factory (documents of the company from China will be in Chinese) Below is a picture for reference.

business license
business license

5. Request Samples: In addition to the selected samples that we need, we should also get more different samples. For example, different packaging boxes and manuals (see what processes they can do and how the quality is), different products (check what processes can be do), and view the entire set of products (details of products). The samples are very helpful for us to know suppliers, we could get more information than we thought.

activity box sample
activity box sample

 

Some suggestions on customizing subscription box/Monthly box

1, Quality, Price, Timeliness & Service: In cooperation with suppliers, we must pay attention to four aspects: quality first, price second, timeliness, and service last.

Quality always comes first. In addition to the value of the product itself, consumers will get additional value. If the quality fails to meet expectations, the kids wait for a month to receive a box with poor quality, which can easily turn from expectation to disappointment. It has had a great impact on our brand.

 

2. Cost Reduction or Outsourcing:  Outsourcing is more important than a low price. We can test and purchase all accessories and materials by ourselves, and then send them to the manufacturer to achieve the purpose of cost reduction and quality control. This not only increases our procurement time cost but also transfers all the risks to ourselves. If any material has a problem, we must communicate with each raw material supplier to solve the risk. It is better to give all the raw materials to the manufacturer so that they can help them choose

the raw materials, and all the problems will be handed over to them to solve. It can not only provide procurement efficiency but also make it easier to do quality control.

 

3. Focus samples: Because the kid’s subscription box needs many accessories or kits, many details need to be modified repeatedly. When proofing, we must clearly put forward our needs, in this way, the manufacturer could be closer to our ideal demand when proofing.

 

If the customized sample does not meet expectations, never rush to change manufacturers.

First, collect the problems in the samples.

Second, find the cause of the problem.

Third, let the manufacturer provide solutions or suggestions.

Then do the second proofing.  

This is a necessary step in proofing.

 

4, Focus on the design of packaging, description, and content creation

When we finish market research, product analysis, and audience analysis. How to do project design when preparing to develop products? We can use Fiverr, Upwork to find content creators.

 

 

How does a line tracking robot work?

Line tracking car

Working principle of line tracking car

Car tracking system based on 51 single chip microcomputer.

The system uses two groups of highly sensitive photocells to detect the black track of the road surface, and uses the single chip microcomputer to generate PWM wave to control the speed of the car. The test results show that the system can track the given path smoothly.

 

In the previous national student electronic design competitions, the simple intelligent car integrating light, machine and electricity has appeared many times. After demonstration, comparison and experiment, we have made the tracking circuit system of the simple car. The whole system is based on the mechanical structure of the ordinary toy car, and uses the car chassis, front and rear wheel motors and their automatic recovery device to track the black track of the road smoothly.

line tracing robot

line tracing robot

 

Overall scheme

The whole circuit system is divided into three modules: detection, control and drive. Firstly, the photoelectric tube is used to detect the road signal. After being processed by the comparator, it is sent to the software control module for real-time control, and the corresponding signal is output to the drive chip to drive the motor to rotate, so as to control the movement of the whole car

 

Sensing detection units

The smart car runs on the white paper “road” with black lines. Because the reflection coefficients of the black line and white paper are different, the “road” – black line can be judged according to the strength of the received reflected light. In this module, we can use a simple and widely used detection method – infrared detection method.

  • infrared detection method

infrared detection method, that is, using the characteristics of infrared with different reflection properties on physical surfaces of different colors. Infrared light is continuously emitted to the ground during the driving of the trolley. When the red light meets the white ground, diffuse emission occurs, and the reflected light is received by the receiving tube installed on the trolley; If the black line is encountered, the infrared light is absorbed, and the receiving tube on the trolley cannot receive the signal.

  • sensor selection

There are many devices used for infrared detection in the market. The self-made probe can be made by using the simple external circuit of the reflective sensor, or the integrated infrared probe with simple structure and reliable working performance can be used.

ST series integrated infrared probe is cheap, small, easy to use, reliable and widely used. Therefore, st168 reflection sensor is finally selected as the infrared light transmitting and receiving device in the system, and its internal structure and external circuit are relatively simple.

st168 detection circuit diagram

st168 detection circuit diagram

 

Applications in our daily life

  • Industrial Applications: These robots can be used as automated equipment carriers in industries replacing traditional conveyer belts.
  • Automobile applications: These robots can also be used as automatic cars running on roads with embedded magnets.
  • Domestic applications: It can also be used at homes like floor cleaning etc.
  • Guidance applications: It be used in public like shopping malls, bank, hotel etc to provide path guidance.

 

What’s accessories do i need for a line tracking robot?

Above are the accessories that for a line tracking robot. It’s a basic robot for starters.

What can line tracking robot kit used for?

1. It can be used in schools ,learning centers, educational institutions to cooperate with teachers’ STEM courses.

2. As home science educational toys that being an interactive toys between parents and children.

3. Making into an monthly activity boxes or subscription boxes for kids 

4. Science tools for kids

5. Robotics for schools

Where to buy the line tracking robot kit

You could get the line tracking robot kit on local Amazon shop and you may get it quickly.

If you are need sourcing line tracking robot wholesale. You could check this line tracking robot.

 

 

Seed Growth Experiment – STEM Toys for 7 year olds

Could we find some magic STEM Toys for 7 year olds ?

The seed growth experiment is quite good.

 Seed Growth Experiment - STEM Toys for 7 year olds

What does seed baby like? Seven seed experiments satisfy children’s desire to explore.

Who says seeds need sunshine, water, air and suitable temperature to grow? The children have their own ideas about the growth of seeds. Some think that the seeds like to drink milk, and some think that the seeds can understand their speech and grow up by whispering to them.

Are these ridiculous? Not at all. Because no one is born to know it.

Today, let’s see how foreign teachers make children learn about seeds? Through 7 experiments, let the children explore, research and summarize by themselves.

Experiment 1: do seeds need light to grow?

The children prepared two identical containers, the same soil and water, put in the same seeds, and made labels, light and dark

Dark seed is put in a carton to avoid light except for watering during the period. Place light seed in a place where you can normally get in touch with the sun.

A few days later, the seeds that saw the sunlight had germinated and were healthy and strong. But only two seeds that did not see the light germinated, both thin and small, and one of them had withered.

Experiment 2: what kind of temperature does the seed like to grow?

The children used the same cups, placed the same soil, water and seeds, and made two labels, one is “low temperature” and the other is “room temperature”.

They put the “low temperature” cup into the fresh-keeping layer of the refrigerator, about 5 ~ 7 ℃.

After a few days, the seeds at room temperature had germinated, while the seeds at low temperature had no improvement at all.

Experiment 3: do seeds need air to grow?

Because the vacuum environment is not easy to create, so we can put the seeds into cold boiled water, so as to create an environment without air. The other has normal soil and water.

After a few days, the seeds in the water have been soaked, while the seeds in the soil grow well.

Experiment 4: is seed coat necessary for seed germination?

Put wet tissue on two trays, and then put three different seeds on each tray. The left one is the complete seed, and the right one is to remove the seed coat or break the seed in half. Keep the tissue moist during the period. After a few days, one side of the whole seed germinated, while the one on the right did not grow, and some even rotted.

Experiment 5: what liquid can help seeds grow?

Plants need water to grow, but what kind of water can make them grow better? I met a child who likes to drink milk before. She thought that the seed also likes to drink milk, so she poured several boxes of milk into the flowerpot. A few days later, the flower died smoothly Children always have a variety of conjectures. The following experiment only provides ideas. Teachers can change the liquid according to the conjectures of children in their class.

We prepared ordinary water, salt water, sugar water and vinegar water. The same seeds and soil were put in.

After a few days, healthy seedlings have grown in the cup of ordinary water; there is no growth in the cup of salt water; there is a small seedling in the cup of sugar water; there is no growth in the cup of vinegar water.

Experiment 6: different seeds, who grows fast?

There are many kinds of seeds. Please collect the seeds and have a growth competition! Whose seed germinates first, whose seed grows fast~

The same seed can be put a few more, in order to avoid bad seeds, leading to the failure of the experiment. You can label each seed with its name next to it.

The children are usually in high spirits, watching every day to see if their little players have sprouted. (Note: keep the tissue moist during the experiment)

Experiment 7: do the seeds look the same?

What seeds have you seen? Do they look the same? Please collect the seeds, and then pick up the magnifying glass to observe carefully~