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.

Two inches tall and trapped in a bathroom at Wanda’s house, the kids must use what they’ve learned about structures to escape before Wanda’s mother discovers them.

Ralphie is crushed when a fever keeps him home from school the day he's scheduled to host a FNN (Frizzle News Network) television broadcast on health. With Tyne Daly as Ralphie’s mom.

Ms. Frizzle takes the class on a dinosaur dig, courtesy of her old school chum, paleontologist Dr. Carmina Skeledon, and travels 67 million years back in time!

Is Mr. Sinew any match for the Friz? At this year’s “Teacher-athlon,” the kids fear Ms. Frizzle doesn’t stand a chance against the muscle-bound gym teacher from another school, so the class travels inside her body for a closer look.

Arnold's so excited he doesn't have to go on a field trip! But when he accidentally swallows his miniaturised class, he becomes the field trip!

Ms. Frizzle combines Dorothy Ann's physics and Ralphie's baseball into a "Frictionless Baseball Game."

To help them understand how the Earth makes islands, Ms. Frizzle presents the kids with an island that hasn’t been discovered yet!

When Dorothy Ann warns the kids there’s an asteroid headed straight for their school, Ms. Frizzle arranges a field trip into space.

“Where did the hot go?” wonders Arnold when his hot cocoa cools off. So, Ms. Frizzle whisks the class to the Arctic!

Ms. Frizzle transports the class into a 1950s horror movie, where a 50-foot praying mantis is wreaking havoc on the town. Ed Asner stars as the film’s power-mad protagonist, General Araneus.

Phoebe tries to grow a vine for the school play, Jack and the Beanstalk. But her plant is more like a beansprout than a beanstalk! With the opening curtain only moments away, Ms. Frizzle turns Phoebe into a bean plant so she’ll grow into the star of the show!

Wanda plans to see The Nutcracker ballet, but during a trip to Murph’s recycling plant, the toy soldier she needs to get into the theater accidentally becomes a plastic pellet! Ms. Frizzle activates the Bus’s Un-Recycler, taking the class and Murph on a song-filled field trip, where they learn how everyday items are made from recycled trash.

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!

Arnold and Keesha are in trouble when they forget to bring in their assignment on "two things that go together."

Always the caring soul, Phoebe goes on a crusade to save the animals and plants of the desert -- and discovers how well they take care of themselves.

The Magic School Bus goes into show business when Keesha directs a movie about social animals for the school science fair.

The Friz transforms the bus into a Weathermobile and -- in a wild ride through the skies -- Ralphie becomes the meteorological superhero of his dreams.

Arnold brings in a webbed hoop for the International Show-and-Tell Competition, left behind by his great-aunt, a famous archaeologist, but he has no idea what it is! Can the kids find out what it is before he takes the stage? With Alex Trebek as the “Sportscaster.”

When Wanda’s favorite singer, Molly Cule comes to town and she chooses Ms. Frizzle’s class to wash her famous car, the kids discover how to clean the car down to the very last bit.

The class is thrilled about its upcoming concert at the Sound Museum -- until they discover the spooky mansion is more of a thrill than they bargained for. With Carol Channing as Cornelia C. Contralto.

When Ms. Frizzle invites the class’ parents in to see that their kids are learning about bats, Ralphie and the gang are convinced The Friz is a vampire! With Tyne Daly as Ralphie’s mom; Eartha Kitt as Keesha’s grandmother; Elliot Gould as Arnold’s dad; Dana Elcar as Phoebe’s dad; and Edward James Olmos as Carlos’s dad.

Keesha and the class return from vacation to find her prize cucumber has turned into a pickle! Could the Mike Robe gang be to blame?

Shrunk inside Tim’s model airplane, the class goes on a high-flying field trip to find out how things fly.

The light show at Walkerville’s old theater is illuminating, but Arnold’s bossy cousin Janet claims she could put on a much better show—if there wasn’t a ghost living in the theater!