❋【Newtons Cradle】 Newton cradle demonstrates the third law of motion with swinging spheres; when one ball is lifted and released it sends force through the rest, pushing the end ball in the opposite direction; these swinging kinetic balls are perfect addition to your office desk decoration accessories or teaching tool at schools.

❋【Colorful Pendulum Balls】Glowing Newton ball swing more dazzling at night, the base has a luminous plate, projected onto the glass beads, glass beads showing colorful, very attractive.Elegant decor and stylish design make it a great desk decoration for your bedroom or office.Fitted with 4*AA batteries (NOT include).

❋【 Widely Use】Is a perfect way for kids to learn about conservation of momentum and energy. They are great for psychology, science and physics classrooms and are also great for kids with ADHD or autism. The holographic colors help them to focus more and make It unique among any other Newton’s cradles on the market. It makes a great present for decorating an office. It is an effective way to relieve stress and frustration for children and office people.

❋ [PERPETUAL MOTION] Is the only Newton’s cradle in the world that changes colors with light. Its unique design makes it change to holographic colors when exposed to sunlight or artificial white light, which makes it stand out from many other science or office products.Size:15*15*11.5cm/5.9x5.9x4.5 inch.

❋【Perfect Gift】Suitable for psychology, teaching tools and furnishings, a nice gift for your kid, let them experience the fun of mechanics in the process of playing this fun gadget.Very suitable as a gift for friends or relatives. Especially on important days such as Christmas, Valentine's Day and Children's Day.