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Explore the principles of physics with the Newton Pendulum Cradle Balance Steel Balls. This classic desktop toy demonstrates the concept of momentum and energy conservation through a series of swinging steel balls. When one ball is lifted and released, it strikes the others, causing a ball on the opposite end to swing outward in a perpetual motion. Ideal for educational purposes, office decor, or as a unique conversation piece, this pendulum cradle combines scientific principles with elegant design.