Newton cradle balance balls with mirror not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy;Material: Chromed Plastic Base + Metal Holder+ Fishing Line. Demension:18.5x12x20cm/2.54cm/7.28x4.72x7.87inch;Use it to waste time, relieve stress, tune out boring coworkers, office desk toys physic ball, or schooling youngsters in physics;Excellent educational & science gadget, own your very own piece of scientific history and explore significant values of physic;Something gets everyone's affection and makes a lively office decoration or executive gift, lift one of the 5 steel balls at either end and let it swing back.

• Willcomes Newtons Cradle Z-shaped Balance Balls Physics Science Art in Motion Fun Desk Toy Accessory
• Silver

Willcomes Newtons Cradle Z-shaped Balance Balls Physics Science Art in Motion Fun Desk Toy AccessoryWillcomes