QUICK: Name the most powerful and complex supercomputer ever built. Give up? Here s a hint: It s housed in your head and it s the one thing that makes you YOU. Your brain is mission control for the rest of your body and steers you through life. Not bad for something the size of a softball that looks like a wrinkled grey sponge! In this fascinating, interactive book -- a companion to the National Geographic Channel hit show kids explore the parts of the brain and how it all works, brainy news nuggets from a neuroscientist, plus fun facts and crazy challenges."