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Product size : 15*15*7cm
Weight: 200g
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Perpetual Motion Machine necklacee Product size : 15*15*7cmMarble Perpetual Machine is a very unique, one of a kind toy decor gadget. FEATURES It will keep you and anybody else who watches it mesmerized for hours. It is a decorative ornament, and it can also be used as a tool for physics explanation for elementary school students.. Great for home ornament, study or office desk table decor accessories, etc. Also good for birthday gift and kid toy. The perpetual motion is a piece of revolving art for your desk.
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