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How to make a walkie talkie
Gather your materials.
For this simple project, you'll need :
Two tin or aluminum cans, or two papers cups five-to-ten meters of string a hammer a nail two tin or aluminum cans will hold up better than plastic ones. The string is less likely to tear through the bottom of a tin or aluminum can.
Poke the nail through the bottom of each can/cup. Make the holes in the cans large enough to feed the string through the holes.