"Y" Type Newton's Cradle Balance Balls Science Pendulum Desktop Toy - Red Brown + Silver (2 PCS)
Brand N/A Model N/A Quantity 2 piece(s) per pack Color Red brown + Silver Material PVC + stainelss steel + fishing line Specification Big one size:13.5x11x14cm; Small one size: 9x7.5x9cm Other Feature This classic desktop display piece has become a must have for office decor; Swing one steel marble back let it go and watch as kinetic energy causes the one on the opposite side to swing the same distance; If you feeling saucy one day try swinging two or three at once - just don't pass out from the excitement Packing List 2 x Balance ball toy set