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. A top seller in the space museum stores and a cool gift for the science physics enthusiast. Size: Approximately H5.3" x W6.4" x D2" diameter with base. Material: metal 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.