Grab your LEGO bricks and get started. In this book set you'll find simple step-by-step instructions for 10 incredible chain reaction machines. All the special elements you need to build these machines are included in the set. And the best thing is: The movable models can then be combined with each other so that new, large machines are created again and again, with which crazy chain reactions can be triggered. Here you will quickly become a construction professional and can design your own machines after a short time. There are no limits to your imagination! The ultimate fun for LEGO fans young and old.