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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 alone is awesome, but put them together and you get incredible chain reactions. Then, combine the machines in any order you like to create your own chain reactions. Experts worked with educators and 11-year-olds to invent the machines, then wrote a book that teaches the skills (and some of the physics behind the fun) kids need to create their own amazing chain reaction machines. 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 a 78 page 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.