WP6387077 - Rattleback - Celtic wobbly wood made of plastic

If you turn a wobble bar lying on its rounded side on a flat surface, it will behave differently depending on the direction of rotation: In the direction of rotation to the left, the wobble bar rotates stably as expected until it comes to a standstill due to friction.  In the direction of rotation to the right, however, the wobble bar quickly slows down and begins to wobble along its longitudinal axis. After the rotation has completely changed to a wobbling oscillation, the wobble bar begins to rotate in the opposite direction to the original direction of rotation.
various. Colors,
approx. 20x100mm
(price per piece)

Translated with DeepL.com (free version)