Arc-shaped Cradle Balance Ball Pendulum Perpetual Motion Instrument Science Toy for Stress Reliever

SpecificationName Cradle Balance BallSize 26 16 23cm sphere diameter 1 6cmMaterial plastic nylon line steel ballFeatures1 The principle of conservation of momentum in physics toggle one two three ball can see different effects fun unlimited2 Not only demonstrates a pendulum but also shows the Laws of Conservation of Momentum and Energy 3 Friction and damping effects are also observed 4 Often used as a toy to amuse people 5 Includes steel balls plastic frames and base 6 Great gift for everyone Package included1x Cradle Balance Ball