The Magic School Bus Inside the Earth is the second book in the book series.


The kids in Ms. Frizzle's class have been studying animal homes for almost a month. It's a relief when she announces, "Today we are going to start something new." They are going to study Earth science.

For homework, the kids are supposed to bring in rocks. But when they show up with everything from concrete to muddy Styrofoam, Ms. Frizzle decides it's time for a field trip. All aboard the bus! They dig through the Earth's crust, then traveled straight to the core and out the other side--through the mouth of a volcano!


  • This book was featured as a featured book on Reading Rainbow, and was narrated by Keisha Knight Pulliam.
  • Phoebe is a new student, this is her book debut.
    • On the other hand, her debut in this book is likely the inspiration for her catchphrase "At my old school......".