It's Ms. Frizzle's birthday, and a field trip to the bakery seems perfect — until the Bus's shrinker-scope goes on the fritz and the class gets baked in a cake! With Dom DeLuise as the Baker.

Phoebe is on a mission to save plants and animals living in the desert, and Ms. Frizzle takes the class to the desert to see the environment first hand.

On "Accidental Science Project Day," the class takes a close look at what's rotting in an abandoned lot.

Ms. Frizzle's miniaturized class becomes a mechanical frog so it can hop along in search of Wanda's missing pet.

Establishing a connection between a soggy shoe and a tuna sandwich leads to an ocean field trip.

While Ralphie hosts a TV broadcast from his sickbed, his classmates seek to discover the cause of his illness.

Ms. Frizzle's students explore Arnold's digestive system after he accidentally swallows his miniaturized classmates.

Arnold's know-it-all cousin Janet drives the kids crazy when she joins Ms. Frizzle's class on a field trip and gets them lost in outer space!