Juvale Newton's Cradle Balance Pendulum, Physics Learning Desk Toy, Swinging Kinetic Balls for Home, Office Decoration, Stress Relief, Fun Science Fidget Accessories (7x6x7 in)Functionality and Design: Add a touch of elegance and entertainment to your desktop accessories and decorations with these swinging kinetic balls, also known as Newton's Cradle balance balls Educational Value: Newton's Pendulum balls are not just a decorative accessory but also serve as an excellent tool for learning science or physics, or as a stress reliever Reliable Quality: Our Newton balls desk toy is made with stainless steel bars, the pendulum