You will Watch The Magic School Bus Season 2 Episode 8 online for free episodes with HQ / high quality. Stream cartoons The Magic School Bus Episode 21 The Magic School Bus Revving Up Mr. Junkett, a vehicle maintenance inspector, wasn’t pleased when he inspected the magic school bus. In fact, he decides to take it to the junkyard to smash it. The Friz and the class have to do something to save their bus. Naturally, they have decided to shrink and go inside it. All the problems seem to be caused by peanut butter, as Mr. Junkett was eating a peanut butter sandwich while inspecting the bus.