Item Type: Newtons Cradle Balance Ball Toy Material: Plastic, Metal, Density Board Size: Approx. 37 x 20 x 24cm / 14.57 x 7.87 x 9.45in Package List 1 x Base 1 x Steel Frame 1 x Ruler 1 x Glove 1 x Cleansing Cloth 1 x Instruction Warm Tip: Children should play under adult supervision to avoid swallowing small toy parts. 1Educational and Entertaining: Newton cradle balance ball provide a mesmerizing display of physics in action, while also serving as a decor for your desk or home. 2Relieves Stress: Gently moving the metal balls back and forth creates a soothe motion that helps to relieve stress and promote a sense of relaxation for you. 3Durable Construction: Made of plastic and metal, this balance ball toy is built to withstand daily use and last for a long time, sturdy and resistant to wear and tear. 4Eye Catching: The snake shape design of this newton ball balance toy adds an artistic touch to any space, elegant looking makes it a great conversation starter. 5Perfect Gift: This decorative newton cradle metal ball toy is an ideal gift to physics enthusiasts, students, or anyone who appreciates the beauty of science.