1、EASY TO USE: With a simple and modern design, this perpetual motion machine requires no assembly. Interesting toy with power adapter, plug and play, easy and convenient to use. 2、DECOMPRESSION: When you feel tired from work or need to relax your brain for a while, turn on this perpetual motion machine and watch the trajectory of the metal ball, which can help you relieve stress. 3、EDUCATIONAL: Perpetual motion simulator toy helps to demonstrate the law of momentum and conservation of energy, use it in the classroom to share the exciting world of physics and science. 4、ATTRACTIVE: This perpetual motion device utilizes electromagnetic induction and the law of gravity to keep the ball dancing to entice kids to learn more about physical science. 5、GIFT CHOICE: The perpetual motion desktop toy is the perfect gift choice for housewarming, birthday, Christmas and more. It can be given to our friends, kids, family.