Photo 1 of CERROPI Newton Cradle Balance Balls, Newton Pendulum with 7 Balls, Classic Newton Swing Ball, Science Physics Gadget | Desk Toys & Accessories, 70+ Sec Swingtime, Marble Base, Black

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Photo 1 of CERROPI Newton Cradle Balance Balls, Newton Pendulum with 7 Balls, Classic Newton Swing Ball, Science Physics Gadget | Desk Toys & Accessories, 70+ Sec Swingtime, Marble Base, BlackPhoto 2 of CERROPI Newton Cradle Balance Balls, Newton Pendulum with 7 Balls, Classic Newton Swing Ball, Science Physics Gadget | Desk Toys & Accessories, 70+ Sec Swingtime, Marble Base, Black