Change is good for everyone except Arnold, who's worried that a new teacher - Ms. Frizzle's young sister - will alter the class's "ecosystem".

A field trip to the world's windiest mountain helps Keesha and the class strengthen a set piece for a sequel to "The Three Little Pigs".

Ms. Frizzle takes the class to Hawaii where an overprotecting Wanda gets schooled when she's forced to think like a tiny little fish.

Tim pens an original comic book for the school's upcoming time capsule ceremony that pits Weatherman against Captain Rock Man. But who will win?

While visiting a mountain made of magnetite, Ralphie and the class shrink to subatomic size to get some hot tips for their disorganized dance troupe.

Carlos plans to convince the principal to let the students keep a pet rat in the classroom. But first, he'll have to stop sneezing.

Determined to outwit an old rival, DA applies the art of animal camouflage to a schoolwide game of extreme hide-and-seek.

A lesson on water and its three basic forms -- solid, liquid and gas -- inspires Jyoti's submission for a "3-in-1 Gizmo That Goes" contest.

An out-of-this world class trip takes the students up into space, where a selfie-obsessed Keesha accidentally sparks disaster.

An icy glacier's eye-opening birth story helps a data-driven DA -- who's not one for public speaking -- deliver a talk to a sold-out crowd.

The class constructs a giant robot with help from brainy scientist Dr. Sarah Bellum, then takes a look inside Ralphie's nervous system.

A skittish Arnold looks to alternative energy sources to help keep his fears at bay while camping outdoors with Ms. Frizzle and the class.

Ms. Frizzle turns the Magic School Bus into a submarine to take the class into the ocean's darkest depths and retrieve Jyoti's high-tech locket.

When the class gets an invite to compete on Tim's favorite TV game show, the bus takes them all back in time to bone up on how fossils are formed.

From scratch marks to stolen pepperoni slices, the science classroom's a mess -- and all clues seem to point to Wanda's bird friend, Marty the Magpie.

Wanda's been so busy planning this year's Fall Fun Feast that she forgot about the food. Now her only hope is a farm that's supposedly haunted. Gulp!

Ms. Frizzle and the class race across the internet to recover a digitized Arnold before Jyoti's grandmother accidentally deletes him.

The kids learn to see the world through the eyes of different animals when a careless Arnold loses Carlos's pet rat -- then turns her invisible!

While building (and rebuilding) their own space rover to tackle the terrain on a faraway planet, Jyoti and the class learn that it's OK to fail.

A race between competitive brothers Carlos and Mikey takes the gang to the top of an in-pasta-ble mountain, where they learn about simple machines.

The kids go looking for rain to test out Jyoti's latest invention, "The Autobrella," only to wind up with their heads stuck in the clouds.

A little math helps Ralphie make complicated midair calculations when his cousins recruit him to join their high-flying circus act.

Ralphie doesn't believe Tim when he tells him that trees can talk, so Ms. Frizzle takes the class to a forest that's louder than it looks.

Every person and animal poops. But the class isn't convinced that this so-called "brown gold" is as valuable as DA's famous inventor uncle says it is.

The bus takes Ms. Frizzle and the class deep inside Arnold's cousin Janet to learn why our genes makes us look, act and feel the way we do.

A field trip to the center of the sun takes a dangerous detour when the school's safety-conscious principal, Mr. Ruhle, tags along.