Fascinate your friends by completing an ordinary task in an extraordinary way. Learn to build 10 LEGO(r) machines that can swing pivot roll lift and drop. Then connect rearrange and experiment with the machines to create a chain reaction. With this book in hand and a handful of basic bricks from your LEGO(r) collection the only other thing you ll need is a little imagination. Includes: 80-page book of instructions 33 LEGO(r) pieces Instructions for 10 machines 6 plastic balls String Paper ramps LEGO Chain Reactions is packed full of ideas instructions and inspiration for 10 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. Our team of 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.