Newtons Cradle, named after Sir Isaac Newton, is a device that demonstrates conservation of momentum and energy using a series of swinging spheres.
Every action has an equal and opposite reaction.
When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last .
The base is approx 18cm x 12cm and the cradle is 17cm high including the base.
THIS IS NOT A TOY!