Newton’s Cradle This clever scientific Newton’s Cradle is the perfect desk accessory for your home office. Simply pull back one of the metal spheres and then release to make it connect with the others, it sends the energy through the chain making the sphere on the other end react with equal force. Simply watch this mesmerising desktop gadget swing back and forth. The perfect gift for any young budding scientist to keep on their home office desk. Ideal for a Christmas or birthday present. Warning: this item is not a toy, keep away from young children.