Mini Newton's Cradle Balance Ball Classic Physics Science Fun Desk Children's Desk Toy Decorative Items: Place this Newton's pendulum on the living room table and you will think you are in psychology. 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 to waste time, relieve stress, deafen the ears of boring colleagues, or enroll young people in physics. Science Toy: When you are tired of studying and working, you can mix balls to hear the clicking sound. You love having fun clicking the balls, it relaxes you.