Copernicus Rattleback - A Reversing Physics Toy

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A phenomenal physical curiosity! A semi-ellipsoidal top that spins in only one direction. This toy seems to violate the angular-momentum conservation law of physics. It's a mind-be nding physics experiment right in your own hands! With its unexpected behavior and fascinating motion, experimenting with the Rattleback will leave you feeling like a genius physicist... Behold the mysterious RattleBack, with a property that amuses. One way, it will spin; the other way, it refuses. Exciting and mysterious. Part of Copernicus Toys Compact Curiosities line. Show more