The secret lies in the base; a battery-powered motor spins a powerful magnet, which in turn exerts a variable force on the pendulum weight attached to the outer ring. Even when you know exactly how it works, the perpetual, rhythmic movement and gravity-defying structure still fascinate. Packed with retro geek-appeal this is an excellent curiosity gift line for adults.
- Fascinating ‘perpetual motion’ mobile
- Silver rings continuously spin around a central sphere
- Simple to assemble components
- Requires 1 x ‘9V’ batteries