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The rubber-band helicopter
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Instructions for twenty-one do-it-yourself projects using cardboard, balsa wood, wire, rubber bands, batteries, some radio components, plaster of paris and so on. Projects include a crystal set radio, electric buzzer, and a balsa wood glider.
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Instructions for twenty-one do-it-yourself projects using cardboard, balsa wood, wire, rubber bands, batteries, some radio components, plaster of paris and so on. Projects include a crystal set radio, electric buzzer, and a balsa wood glider.
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"Instructions for twenty-one do-it-yourself projects using cardboard, balsa wood, wire, rubber bands, batteries, some radio components, plaster of paris and so on. Projects include a crystal set radio, electric buzzer, …"
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