Mini Newton's Cradle Balance Ball Classic Physics Science Fun Desk Kids Desk Toy Decorative Items: Place this Newton's pendulum on your living room table, and you'll feel like you're in a psychology lab. Newton's Pendulum: Not only displays a pendulum, but also demonstrates the principles of kinetic energy and conservation of momentum. Friction and damping effects are also observed. Educational Tool: Own your own piece of science history and explore the significant values of physics. Fun Item: Newton's cradle is a timeless and classic desk science "toy." Use it to waste time, relieve stress, drown out boring colleagues, or introduce youngsters to physics. Science Toy: When you're tired of studying and working, you can mix balls to hear the clicking sound. You love having fun clicking the balls; it relaxes you.