This is the perfect desk toy to impress Colleagues and clients alike! Perpetual Motion Desktop Toy is perfect for your outer space themed office or room decor. It is also great for those enthusiastic about science or to demonstrate the laws of physics in science classrooms A simple spin sets the balancing figure in motion. Size: Approximately H4.5' x W6.7' x D1.25' diameter with base. It is not an item that never stops working. It moves and swing after you push, and finally it will stop due to the resistance of the air and friction.