Description: Classic Executive Desk Toy - Newton's Cradle, version of Colliding Balls Kids educational physics science toy?the principles of Conservation of Momentum and Energy Pull back one or more of the balance balls, release them and the same number of balls will swing up on the opposite side. Great artworks for home or office desktop ornaments, also birthday gift christmas gift for your children Sail type and the base of mirror design?Newton Cradle Balance Ball Desk Physics Science Toy Home Office Crafts Material: Metal, Plastic Color: Black Size(L*W*H)?approx 23*14*18cm/ 9.05*5.51*3.14inch Package Includes: 1 Set Newtons Cradle Balance Balls Toy Note: Due to the manual measurement, please allow 1-5mm differences in size Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand
