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Many of the activities on these pages may require adult supervision.
Be sure to tell a grown-up about what you're planning and ask for permission before getting started.

How to conduct sound.

This walkie-talkie, made with an old piece of garden hose, is like the speaking tubes that were used on ships before telephones were invented.

You need a piece of hose and two blocks of wood wider and thicker than the hose and just the right size to hold in your hand. Use a brace and bit to make a hole in the end of each block, going about halfway through. If you do not have a brace with the right drill bit, ask an adult with an electric drill to help you. Then cut a wide v in the middle of the blocks, exposing the drilled hole. This cut may be difficult. Ask a grown-up to help you. Push the hose into the drilled holes in both blocks.

You should be able to talk to someone on the other end. The hose can be quite long, going from one room to
another or even from floor to floor.

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