Ms. Frizzle is the weirdest teacher around. And when it comes to field trips, Arnold is her most reluctant student. An outing on the Magic School Bus can be torture for Arnold, and there is just one thing that could make it worse: his cousin Janet. When his know-it-all relative's visit is combined with an all-wheel learning adventure, it is sure to be a school day Arnold won't soon forget. the Friz is always hungry for adventure, and that's just what the class gets. With so much to learn about ecosystems, even Arnold finds himself eating up all the food-chain facts.