KLUTZ LEGO Chain Reactions
Fascinate your friends by completing an ordinary task in an extraordinary way. Learn to build 10 LEGO 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 collection, the only other thing you'll need is a little imagination.
33 Lego elements
From KLUTZ, for ages 8 yrs-teen.