Toy Telephone

How to make a toy telephone to play?

I’m trying to make a toy phone. I was going to make one of those regular phones that children make using two yogurt cups and a string but then I remembered Yahoo Answers and decided to see if anyone has a sugestion on the topic. Maybe there’s a way of making it more efficient? Or maybe there are other kinds of phones you can make, more elaborate ones? Thank you!

That’s an interesting problem. The wikipedia article about the invention of the telephone lists several “make and break transmitters and electromagnetic receivers” which is what a telephone is.
(See: http://en.wikipedia.org/wiki/Invention_of_the_telephone#Make_and_break_transmitters_and_electro-magnetic_receivers)

You can get small speakers at an electronics store, like Radio Shack. These can act as both transmitters and receivers. When you speak into a speaker it vibrates a permanent magnet within a coil which generates an electrical current. If you run 2 wires between the 2 speakers, you might be able to hear the sound in the other speaker but it won’t travel very far–maybe a few feet at most. It would be interesting to try.

Good question!

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