Almost instant
Did you ever make a telephone like this when you were a child? The
technology is very simple and needs no batteries! The idea was popular
long before the invention of walkie talkies.
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Now
- With the skewer, punch a hole in the bottom of each tin. (A
job for an adult)
- Take one tin and insert one end of the string up through the
hole and into the tin. Tie a LARGE knot that will not pull out.
- Attach the other end of the string to the second tin the same
way.
Now two children can use the "telephone". One speaks into
her tin and her partner hears her message in his. Then they can reverse
the process. NOTE The string MUST be held taut. At first this can
lead to a tug of war! In my experience, with a little adult help the
children soon get the hang of it. |
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