- Lego Chain Reactions by Pat Murphy
Fun, engaging and educational
My Lego-mad six year old has loved building the models from this book. His younger sisters have loved watching the contraptions! Lots of brilliant information about the physics and how it all works. Really engaging and fun. You need quite a lot of standard extra Lego bricks to be able to build more than one model at once and set up a good chain reaction, but luckily we have a fairly good collection! Thoroughly recommend this.