The Mysterious Rattleback Two Pack! This is one of the simplest and coolest physics toys! It will behave differently when you spin it clockwise or counterclockwise. Cool desk toy or a gift. The shape of this toy is very curious and it produces an unexpected effect when you spin it. This toy is also known as Rattleback or a Space Toy.

More about Rattlebacks:

A rattleback is a semi-ellipsoidal top which will spin on its axis in a preferred direction. But, if spun in the opposite direction, it becomes unstable, "rattles", stops and reverses its spin to the preferred direction. This spin-reversal motion seems, at first sight, to violate the angular-momentum conservation law of physics. Moreover, for most rattlebacks, the motion will happen when the rattleback is spun in one direction, but not when spun in the other. Some exceptional rattlebacks will reverse when spun in either direction. This makes the rattleback a physical curiosity that has excited human imagination since prehistorical times. For more info on Rattlebacks, go to: http://en.wikipedia.org/wiki/Rattleback


Recommended for ages 8 and older.

Weight: 0 lb 4 oz ( 0.11 kg )

  WARNING

CHOKING HAZARD Small parts. Not for children under 3 yrs.