THY COLLECTIBLES Unique Z-Shape Newtons Cradle Balance Balls with Mirror 7 inch Desk Top Decoration Kinetic Motion Toy for Home and Office

These little steel balls will keep you entertained all day The back and forth motion is a soothing experience you'll enjoy day after day, learn about

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Who knew the conservation of momentum and kinetic energy could be this fun? Sir isaac, of course. This unique Z-shape desktop display piece has become

THY COLLECTIBLES Unique Z-Shape Newtons Cradle Balance Balls With Mirror 7 inch Desk Top Decoration Kinetic Motion Toy For Home And Office