Kinetic Art Perpetual Motion Machine Physical Balance Kinetic Energy Model.... Kinetic art perpetual motion machine is made of high quality plastic. The difference with the old fashioned perpetual motion machine advantages one mute two continuous use three touch switch. Safe and stable easy to use one key to open one key to close The perpetual motion machine is made of high quality plastic and stainless steel the unique design concept is impressive. Reliable sturdy accessories for table sport decoration. Use kinetic energy to keep the ball in an infinite loop. Surprise your friends with this clever toy and leave them scratching their heads everyone will love it This kinetic art perpetual motion has a simple shape yet unique and complex design to keep the ball rolling and a major friend's perfect for toys and decorations just a decoration no connection it won't slide automatically Perpetual motion desk toy is suitable for psychology to relieve work fatigue and stress. It could be great desk toy for an adult office. It's also perfect for outer space science themed classes or office decor when you need to clear your head perpetual motion machines are where your eyes are. When you're bored and stressed you can put the physical toy on the table activated and quietly watches charming swing it will mesmerize you. It can help you relieve stress