Thames & Kosmos Gumball Machine Maker
Build your own gumball machine with this science kit that's part marble...Each segment of track teaches a different lesson in mechanical physics,...Track segments are modular and can be easily moved around to create an...As they roll down the tracks, the gumballs perform cool stunts via a pulley...The kit works with standard machine-size, 16-mm (5/8-inch) gumballs, the a...
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