product details

Rattlebacks!

Puzzling! A deceptively simple-looking piece of molded acrylic polystyrene provides a fascinating demonstration of center of gravity and physics. Tap on end, and the Celt will mysteriously begin to spin. Spin the Celt clockwise, and it will reverse direction. The real fun comes when you begin to search for an explanation to this surprising phenomena. Sold in pairs.

Recommended for ages 8+.