Science Kits for 4 Year olds ; Telephone
Are there any easy science kits for 4 year olds ? Yes. The DIY telephone is a good choice.
This kit is perfect for kid’s STEM education. It’s suitable for schools, learning centers and education companies for business. Children could assemble it by themselves.
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years.
1. Make DIY by hand and experience DIY telephone
2. Understanding science is closely related to life
The sound is produced by the vibration of the object. When the vibration stops, the sound also stops. The object that is making a sound is called the sound source.
When we speak, we can touch our throat and feel the vibration. It is the vibration of the vocal cords that produces the sound. The louder the sound, the stronger the vibration. Throw a small stone into the pond and you can hear it. All gases, liquids, and solids can propagate sound, such as the “plop” sound.
The “earth phone” can show that both liquids and solids can transmit sound. The transmission of sound is inseparable from matter. Sound can travel not only in the air but also in liquids and solids; sound is transmitted through matter, which we call medium. The transmission of sound is inseparable from the medium.
Generally speaking, the sounds we hear are transmitted through the air. But in fact, air is not a good sound transmission medium.Compared with gas, liquid spreads sound faster; and compared with liquid, solid spreads sound faster.
Moreover, the same solid, due to the difference in the material of the composition, the speed at which they propagate the sound will also be different.
It’s a good experiment for kids to do.