Build 10 exciting machines that spin, swing, pivot, roll and drop!

Create your own incredible chain reactions by rearranging and experimenting with the contraptions. The book includes 33 special Lego elements that combine with the most common bricks from your collection to make your machines go. Lego Chain Reactions by Klutz includes: 33 x Lego bricks, 6 x balls, string, paper ramps, pop-up signs, funnel, flag, bucket, platform and a 74-page instruction book that teaches the physics behind the fun.