31883 Project Blueprint Newtons Cradle (12 pc/pack)

Made with high-quality steel and plastic, Project Blueprint’s Newton’s Cradle features a smooth black base, bright blue frames, and 5 shiny connected steel balls that swing back and forth. To operate, pull back the polished steel ball on one end and then let it fall to create a transfer of energy setting the line of globes into motion. Provides a soothing visual experience and works great as an office decoration or fidget toy.