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Crazy hands or simple motor by hand. :)

What we need to do. Tools:
Sandpaper;
Pliers;
Toothpick;
Wire;
Battery;
Adhesive tape;
Pencil;
Magnet and ready
















Voila! ))))



Source:
creative improvised means Rukozhop physics
 1987. Arnold Schwarzenegger in the Moscow club "Athletics"  The matter of every man.