Self-Stirring LEGO Mug

Using the power of magnetism, David Ye created a self-stirring mug out of LEGO, some magnets and a mug. We thought it would be some kind of weak 10-stirs-per-minute contraption, but the video actually shows that it's like a miniature whirlpool in there. We'd rig one up ourselves, but we're afraid we'd add too much…

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