Newtons Cradle Pendulum

The swinging magnetic ball toy is made of durable steel and ABS material, bright, preservative and not easy to rusty.the balls have a reflective mirror finish, and the base is a lightweight plastic. It is a very funny decompression toy that a ball can be used to hit other balls and swing.Not only demonstrates a pendulum, but also shows the Laws about conservation of Momentum and Energy. The cradle balance balls continue in perpetual motion for 10-20 seconds.