Just a gentle spin on any hard, smooth surface and this remarkable top accelerates and soon stabilizes at a constant rotation for hours. A blinking light on the top changes colors and, thanks to persistence of vision, produces beautiful patterns. The outside surface of the top appears to be solid with no moving parts. Yet, listen carefully and you can even hear the top speed up.Where does the energy come from? Is it perpetual motion? Otherworldly influence? Magic?
The secret is a tiny, off-center, rotating motor. Amazing to watch and remarkably elegant. Explanation included. Uses a common "button" battery. Two sets of Batteries included. 3.25 cm tall 3.5 cm diameter (~1.25" x 1.4" dia).