Offbeat

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submitted 1 month ago by dantheclamman@lemmy.world to c/offbeat@lemmy.ca

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[–] Nindelofocho@lemmy.world 3 points 1 month ago (1 children)

A handful of small metal balls inside it and a magnet at its holding spot is all it would need id imagine

[–] TheOakTree@lemmy.zip 1 points 1 month ago* (last edited 1 month ago)

I was thinking this too. Four captive rollers in a magnetic frame on the inside of the ball, and a moving electromagnet below the floor to guide it.