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 balls have a reflective mirror finish, and the base is a lightweight plastic to add to your satisfying toys Specifications: This fun "perpetual motion" stand designed for physics demonstrations measures 7.0 x 5.8 x 7.1 inches, making it a great size for table top use or desk decorations in the lab or at home Desk Relaxation: You will receive 1 Newton's cradle pendulum, perfect for adding to your collection of fidget toys, desk gadgets, knick-knacks, and accessories with a touch of calm to any workspace