KLUTZ-Crazy Action Contraptions. This is a fantastic way to re-awaken the little engineer in all of us. This book is full of crazy contraptions made by completely by Lego s and rubber bands. Sixteen crazy contraptions that zoom across the floor; fly down a zip-line; add a new flair to drawings; spin your way to destruction and much more! Kit contains all the Lego blocks; gears; and axles you need as well as step-by-step illustrated directions; a troubleshooting section; a Make-Your-Own section that explains the detailed workings of each part; and a storage box for all of your little Lego parts. Recommended for children ages 7 and up. WARNING: Choking Hazard-small parts. Not for children under 3 years. Author: Doug Stillinger. Spiral-bound with a soft front cover and hard back cover. Imported.