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FrozenGate by Avery

Here we go again.






Haha no shit "small red laser diode. Only use low power, <5mW, laser pointers, or you'll put your eye out!"
 
I've got a jar with a bar magnet sealed in the center and iron filings around it. The manet can be moved up and down in the center. Does a better job of showing magnetic field shape than this, and much simpler.
 
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