Teach your bricks new tricks!Designed and written by a genius team of experts, educators, and 11-year-olds, the LEGO Chain Reactions kit proves just how amazing physics can be. Using over thirty LEGO elements, plus a few rolling spheres, you can build ten brilliant contraptions that all come together to create an amazing chain reaction. Page by page, detailed instructions help you perfectly build each mechanism while learning how and why everything works. Includes a 78 page instruction and inspiration book, 22 LEGO elements, 6 LEGO balls, 2.2 yards of string, 8 paper ramps, 2 paper pop-up signs, paper funnel, flag, bucket, and platform. Measures 9” x 10” x 1”.