BEWITU Newtons Cradle Balance Pendulum, Swinging Kinetic Balls, Fun Science Physics Accessories for Adults, Calm Down Fidgets Kit, Desk Toys for Stress Relief, Office Desk Decoration (Large Black)

High Quality: The Newton\'s Cradle is composed of a metal ball, a plastic bracket and a plastic base. Use nylon line of good material instead of cheap fishing line. With unique assembly design, the Ne...