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Tin can telephone


Tin can telephone

What to do with this activity?

Nowadays, we can make a telephone or skype call to a friend or relative on the other side of the world. It's amazing! 

If we talk to someone in the same room, the sound of our voice makes the air vibrate. Then the air vibrations make little bones in our ears vibrate, which we hear as sound. 

In mobile telephones, these vibrations are turned into electrical signals and then travel on radio waves.

The main thing your child can learn is that sound is vibration. Do a simple and fun science experiment that shows how sound works.  Follow these instructions from Lemon Lime Adventures for a tin can telephone. The experiment shows them how the sound of a voice is converted into vibrations along the string, then back into sound at the other end. 

It might be even easier to make the telephone with two paper cups instead of tins. Follow these instructions from Science Kids for a paper cup telephone.  


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