structure
Different ways to do the same job. Check the setting and limits of each use before choosing one.
Cardboard
A lightweight body with room for two axle supports. A folded shape may be stiffer than a flat scrap.
Suggested in Make a cardboard car.
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Cardboard
A clean small open box or folded card support. The shape and opening are variables to explore rather than a fixed instrument design.
Suggested in Make a rubber-band sound box.
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