Balance Ball Physics Science Pendulum Toy

This classic Newton Cradle Pendulum is a great metal perpetual motion toy. It has an elegant design and comes in a package containing one piece of cradle pendulum. Its dimensions are 11cm x 13.5cm x 13.5cm and it weighs 400gm. The plastic and iron construction is durable and designed to last. Based on physical laws, when operated correctly, the pendulum will swing for up to 15 seconds. However, the duration of the swing is determined by factors like force and environment. Handle with care when unpacking.