ABS BALANCE DESK DECORATION: The bumper is a clever device that not demonstrates a pendulum, but also newtons cradle pendulum shows the laws of conservation of momentum and energy. PHYSICS MECHANICS SCIENCE TOYS: The unique exclusive contemporary design makes perpetual motion desk toy attactive and eye-catching. Having a fun with the newton's cradle. BALANCE BALLS DESK TOY: These swinging balls will keep you occupied for hours at work and when feeling tired of studying and working, you can stir balls to hear the clinking sound to ease. DESK TOY : Perpetual motion toy can be used as decorative ornament for home and office or for friends or someone you love. As birthday , or Christmas . PLASTIC NEWTON : Newtons cradle balance balls can be applicable to desk and household decoration and also can be as a birthday . Can help your relax down and enjoy the time. Description
Newtons Cradle Balance Balls Portable Desktop Pendulum 5 Swinging Balls Toy Perpetual Motion Desk Decorations Science Physics Gadget for Home Office Games

Features
- Material: ABS
- Size: About 9x7.5x9.5 cm
- Color: As shown

Package Including
1 x bumper without battery