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. • Age Grade: 8+ • Product Dimensions/Weight: 4.3 L x 3.8 W x 4.6 H / 0.4 lb • Inner Pack Dimensions/Weight: 13.7 L x 7.8 W x 9.9 H / 4.5 lb • Made In: China • Batteries not required