LommTree Electric Balancing Perpetual Motion Swing Revolving Gadget Physics Desk Toy Decorative Showpiece - 3 cm  (Steel, Yellow)

Description:Excellent educational science gadget. Not only stimulate people's interest and exploration in physics, but also shows the laws of conservation of momentum and energy.Made of high quality plastic, it is and smooth to touch.Great for home ornament, study or office desk table decor accessories, etc.A nice gift for friends, kids, family. sleek desk toy for adults and children!Come with USB cable, push it by hands and it will use the USB powered to keep on swinging.Specification:Material: PlasticColor: YellowSize: 150x100x150mm/5.91x3.94x5.91inchPackage Includes:1 Piece Perpetual Motion Toy1 Piece USB Cable5 Pieces Steel BallsNote:1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful on-line shopping!