Ms. Frizzle plans another wild field trip to Hawaii, where Dorothy Ann and the rest of her students see an active volcano first hand.

"Hi, I'm Dorothy Ann, one of the kids in Ms. Frizzle's class. When we started learning about volcanoes, I thought we'd just be studying them in books -- but Ms. Frizzle had other ideas. She took us all the way to Hawaii, where we waded through lava and saw a real volcano blow its top. We had a great time -- even though the trip was sometimes almost too hot to handle! One thing's for sure: This was one explosive adventure that none of us will ever forget!" -- Back cover.

When their class project for Ocean Awareness Day falls into Ms. Frizzle's fish tank, Tim and his classmates board the Magic School Bus with their teacher for a real underwater adventure.

The class is turned into insects to learn about them.

Ms. Frizzle's next lesson takes her students on a magic bus ride to the North Pole, where they observe polar bears and other creatures in their natural habitats.

Magic School Bus Science Chapter Book #15.