Newton's pendulum is a classic tabletop toy; it is also known as ball game pendulum, newton's cradle, newton's cradle, permanent mobile This pendulum ball is made of high quality materials and steel base, which not easy to rust and can be used for a long time. Unique design: small weightlifter on the base, design, Iron Man is ready Scientific education: this balance ball of the Newton's cradle can explain Newton's physics knowledge and history to children, and it also helps to explore the mysteries of natural science. Newton's cradle balance ball can be widely used in home office or office decoration or birthday gifts Suitable for collections, business gifts, birthday gifts, home and office decorations. It can be used as an educational toy to improve children's understanding of perpetual motion machines. Made of metal, it is safe to touch and moves smoothly. When you put it in your study or home office, this cool desk toy will be a good pastime. When you are bored and feel too stressed, you You can put it on your desk, start it up and quietly watch its charming swing, it will be fascinating for you. material: metal Model: The Surf Scope of delivery: 1 piece