Rattleback

Rattleback

Regular price
$2.50
Sale price
$2.50
Tax included.

rattleback is a type of spinning top which will only spin consistently in one direction. If spun in the opposite direction, it becomes unstable, "rattles" to a stop and reverses its spin to the preferred direction. This spin-reversal appears to violate the law of the conservation of angular momentum. It's also a very cool trick.