Book excerpt: It’s time for the W. Reid Elementary science fair—home to the weirdest inventions ever, and a lot of trouble! Mike is sure he’s going to win the school science fair with his potato-powered radio, “Potadio.” But when his contraption is electrocuted to life, Mike suddenly has more to worry about than winning first prize. Potadio has a bad attitude, and he now controls the minds of the teachers and students. With his army of minions, Potadio plans to take over the world! Mike must figure out how to beat this spud before becoming a brain-dead zombie himself. Luckily, he has access to a science fair full of crazy inventions that just might help him defeat his creation!