Everybody agrees that mold is just disgusting, until the class goes on a field trip inside a rotting log. They discover that all the dead-looking stuff is actually alive...and it's pretty neat after all. Join the class on their "rotten" adventure, and learn about how nature recycles through decomposition.

The magic school bus shrinks down for a closer look at a "dead" log teeming with life.

Oh, no! Wanda's best friend, Bella the bullfrog, is missing. The class wants to help look for her. Ms. Frizzle says, "The best way to find a frog is to be a frog!" So, the kids take a ride on the Magic School Bus. Join them as they shrink to frog size and learn all about animal habitats!

The story The Magic School Bus Gets Ants in Its Pants is accompanied by everything needed to start a personal ant farm, including a plastic ant house, sand, and a send-away coupon for ants. Original.

The Magic School Sub takes the kids deep into the ocean, where they learn allsorts of fascinating facts about whales.

Ms. Frizzle's class is holding a recycling drive. But when Phoebe loses her necklace, the kids hop on the bus to track it down.