LEGO Chain Reactions is packed full of ideas, instructions and inspiration for ten LEGO machines that spin, swing, pivot, roll, lift and drop. Each machine awesome on its own, but put them together and discover incredible chain reactions! Experts worked alongside educators and 11-year-olds to design LEGO chain reaction machines, then wrote a book that teaches the skills (and some of the physics behind the fun) to make them come to life. This book includes 33 special LEGO elements that combine with basic bricks from your collection to make your machines go. The result is a chain reaction of fun, as one thing leads to another and another and another. The kit includes an instructional book, 33 LEGO elements, eight paper ramps, six LEGO balls, six feet of string, two paper pop-up signs, one paper funnel ramp, one paper flag, one paper bucket and one platform.