XIWUYA Physics Newtons Cradle Steel Bumper Balance Balls Science Pendulum Educational Toy Gift for Home Desk Kids  

100% brand new and high quality Features: Balance Balls is a classic desk toy.?also known as Newton's Cradle, the clacking of the steel balls will keep you entertained throughout the day. Pull back one or more of the balls, release them and the same number of balls will swing up on the opposite side. This set of balance balls is fun for the office and makes a great desktop gift. The apparatus usually consists of an odd number of identical steel balls each suspended by a bifilar suspension from a sturdy frame. Balance Balls only, other accessories demo in the picture is not included! Specification: Material: Plastic & Metal Dimensions: app.9.2x9x7.5cm?3.6x3.5x3.0in? 14x13.5x11.5cm?5.5x5.3x4.5in? Color: Red,Black(optional) Quantity: 1 Pc Net Weight:100g,200g(optional) Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Balance Balls