Play mind games with a famous scientist with the Newton’s Cradle – Creating Hypnotic Motion. For every action there is an equal and opposite reaction. This dazzling and addictive desk toy was named after the famous scientist Sir Isaac Newton, who formulated the Three Laws Of Motion. It perfectly demonstrates conservation of energy and momentum. Simply pull back and release one of the silver balls and allow it to swing. This creates a force that urges other balls forward through hypnotic motion. It’s oddly soothing. Features: Crafted from metal and durable material Named after the famous scientist, Sir Isaac Newton Iconic, intriguing and hypnotic gadget Each ball is attached to opposite sides of the frame by equal length strings Creates a hypnotic motion as the ball swing back and forth Presented in a box Dimensions: 18cm (l) x 18cm (h) x 12cm(w).