Newtons Cradle 5 Pendulum BallsGlowing Newton ball swing more dazzling at night, the base has a luminous plate, projected onto the glass beads, glass beads showing colorful, very attractive. NO MORE BORING, PLAIN NEWTONS CRADLESthe only Newtons 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:12*12*9cm. LEARNING IS MORE FUN 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 Newtons 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. Unique charmPower by Batteries:4 x AA batteries(Not Included). 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. It stays quietly by your side and swings and never stops its noble temperament, when you work hard, or when you are sleeping. When others approach your office or room, they will also be moved by its elegance. Ideal festival giftIncludes steel balls, plastic frames and base.A very meaningful gift to make your room or office more classy. When your good friends and family members receive such an exquisite gift, they will be satisfied to exclaim. The gift is suitable for any period, such as: anniversary, major holiday, graduation, birthday, Christmas, Halloween, Valentine's Day, etc. It will be a thoughtful and satisfying gift.