Put on your safety goggles, because science class is about to get completely out of control. The students at Ella Mentry School have a brand new science teacher named Mr. Docker, and he is acting very much like a mad scientist. He has a loud, cackling laugh that echoes down the halls, and he performs nutty experiments that leave everyone scratching their heads. You will dive right into the laboratory chaos alongside A.J. and his friends as they try to figure out what Mr. Docker is really planning. The strangest part of all is that the teacher claims to have invented a car that runs entirely on potatoes. The kids start to suspect that something much bigger and weirder is going on behind the scenes. Could their new teacher actually be trying to take over the world? This energetic story brings you face to face with explosive experiments and hilarious scientific discoveries. It is filled with wild inventions and the funny logic of third graders trying to solve a major mystery. See if you can uncover the truth before the next experiment goes completely haywire.