_x000D_ Classic Pendulum Balance Balls Bullet Points: 1. [ Superior Frame Materials ] With a steel frame and balls that are not easy to break, this Newton's Cradle Balance Pendulum will last for a long time. The high-quality nylon wire is finely processed to ensure smooth swinging and balance. Enjoy the relaxing and fascinating motion of this classic toy 2. [ Science Physics Learning ] This Newton's Cradle Balance Pendulum is a fun and educational way to learn about the conservation of kinetic energy and the principles of physics. By swinging the balls, you can observe how energy are transferred in a mesmerizing display 3. [ Quaint Toys for Kids ] This Newton's Cradle Balance Pendulum is not only an ornament that can attract children's attention, but also an advanced physics teaching aid that can help children learn scientific knowledge. It is a perfect motion desk toy that can stimulate learning interest and curiosity 4. [ Suitable for Tabletop ] This unique and elegant Newton's Cradle Balance Pendulum features 7 balance balls that create a mesmerizing display of physics in motion. It's a perfect desk decoration for your home that will make your space more interesting and attractive 5. [ Precious Friends Gifts ] This elegant and unique Newton's Cradle Balance Pendulum is a perfect home decoration for kids and children, as well as a thoughtful housewarming gift for your friends and family Properties: Product material: stainless steel Product size: 18*9*13cm/7.09*3.54*5.12in List: 1* Newton's Cradle Balance Pendulum _x000D_