Faxadella Holographic Newtons Cradle with Holographic Wooden Base - Stainless Steel Balls NO MORE CHEAP CRADLES, with scratches, tangled balls, cheap paint or cheap packaging. Holocradle is made with a new technology that makes the balls in perfect alignment so you will never have to worry about the strings becoming tangled. Holocradle comes in a nice box with clear instructions on the back so you can set the cradle up easily in less than a minute. The beautiful colors and the fact that the balls move smoothly for an average time of 40 seconds make science more fun NO MORE BORING, PLAIN NEWTONS CRADLES. Holocradle is the only Newtons cradle in the world that changes colors ONLY 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. LEARNING IS MORE FUN. Holocradle 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 Holocradle unique among any other Newtons cradles on the market. Holocradle makes a great present for decorating an office. Holocradle is an effective way to relieve stress and frustration for children and office people. OUR PROMISE. We stand for customer service and high quality, so if by any chance your Holocradle breaks, even if it is your fault, we will send you a replacement or give you 100% of your money back, no questions asked. Holocradle is proudly made in Philadelphia, Pennsylvania OUR MISSION. We are real people who use our products with our own family every day. We expect the best for our family and want the same for yours. Product weight 1.75 pounds