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Fun Machines
por
Provides instructions for making such devices as a tin-can telegraph, crystal radio, and kaleidoscope, and suggests a variety of related experiments and other activities.
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- ● children's books, science & technology
the long version
Provides instructions for making such devices as a tin-can telegraph, crystal radio, and kaleidoscope, and suggests a variety of related experiments and other activities.
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"Provides instructions for making such devices as a tin-can telegraph, crystal radio, and kaleidoscope, and suggests a variety of related experiments and other activities."
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