LEGO® Chain Reactions is a spiral-bound, softcover, 78-page book that features simple instructions with step-by-step diagrams to create 10 LEGO® brick machines that can swing, pivot, roll, lift and drop.

You supply LEGO® bricks from your collection. This book provides crystal-clear instructions and the extra parts you need to transform your bricks into 10 different wacky chain reaction machines, from a seesaw and ramp to a pop-up flag and falling hammer. 

LEGO® Chain Reactions was written by Pat Murphy and the scientists of Klutz Labs to help kids aged 8 years and up build amazing moving machines. The book and parts inspire open-ended creativity and hands-on learning.

LEGO® Chain Reactions is a National Parenting Product Awards Silver Award winner.