On a special field trip in the magic school bus, Ms Frizzle's class learn at first hand about different kinds of rocks and the formation of the earth.

Release date supplied by publisher. Print book published: New York : Scholastic Inc., [1987]. Audiobook originally released by Scholastic. Issued as a Wonderbook, a pre-loaded audiobook player permanently attached to a hardcover book. Powered by a rechargeable battery ; USB charger required for recharging. Audiobook player has 2 modes. Read-Along mode narrates the story. Learning mode asks questions related to the story.