Friday, September 23, 2011

Telephone Can

Konos Unit: Attentiveness
Theme: Sound

We have been learning about sound and how it travels. Although it isn't the most exciting experiment, we decided to make a telephone can just because we've never done that with Nicholas. How can children today not have at least tried a telephone can?

All you need is two cans (or two cups), string, and two buttons.


Punch a hole in the bottom of each can, thread the string through the whole and tie a knot through a button. The button is not necessary. It just helps to secure the knot and keeps it from slipping out of the hole. You could do without the button if you just made a bigger knot!


Although it is a simple experiment, it was fun and it helped to demonstrate sound.


When Daddy talked into his can, the bottom of the can vibrated from the sound waves. These sound waves (vibrations) traveled through the string and then caused Nicholas' can to vibrate and allowed him to hear what Daddy had said.





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