The only problem with this book is I have to stop reading to write down quotes. It's a great book and written in a really engaging style. Zero to Maker: Learn (Just Enough) to Make (Just About) Anything by David Lang
"Building Bristlebots: Basic Toothbrush Robotics": "With a bag of toothbrushes and some basic electronics supplies, you can give a group of kids a fun introductory experience! Once you have a crew of working bots, get creative building mazes and tracks!