Newton's pendulum is a classic table toy; it is also known as the ball game pendulum, Newton's cradle, Newton's cradle, permanent mobile This pendulum ball is made of high quality materials and a steel base, which is not not rust easily and can be used for a long time. Unique design: small weightlifter on the base, creative design, Iron Man is ready Science education: this balance ball from Newton's cradle can explain Newton's physics knowledge and history to children, and it also helps to explore mysteries of natural science. Newton's cradle balance ball can be widely used in decoration of home office or office 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 perpetual motion machines. Made of metal, it is safe to the touch and moves smoothly. When you put it in your office or home office, this desktop toy cool will be a good hobby. When you are bored and feel too stressed, you can put it on your desk, start it up and quietly watch its charming swing, it will be fascinating for you. < br> material: metal Model: Le Surf Delivery quantity: 1 piece