Lego Chain Reactions: Design and Build Amazing Moving Machines (Klutz S)
Fascinate your friends by completing an ordinary task in an extraordinary way. Learn to build 10 LEGO(r) 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(r) collection, the only other thing you'll need is a little imagination.
80-page book of instructions
33 LEGO(r) pieces
Instructions for 10 machines
6 plastic balls