This book of 16 Crazy Action Contraptions comes with a pack of over 100 Lego bricks, plates, wheels, gears, axles and connectors. With them you can make all the projects in the book, but not all at the same time. From the Supercharged Speedster to the Squeezeclaw Grabber to the Wall Rocket Racer -- all these contraptions spin, stretch, speed, or spring into action. And all of them are totally buildable thanks to super-clear instructions and step-by-step diagrams. Ages 7+.