Here is another gravity defying toy that shows how magnetic levitation works. The American Scientific Revolution Levitation Demonstrator has 3 parts and can be put together easily. Once you twist the axle with your fingers, this will spin horizontally for up to 20 minutes. No battery is required either.
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Revolution Levitation Magnetic Desk Toy ☰ Gadgetify
The black and white reflecting strips on the axle are useful for measuring rotation speed using a stroboscope.
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