Ms. Frizzle's class becomes an anthill of activities when the ants get out.

The students in Ms. Frizzle's class embark on another journey when the Magic School Bus tours a decomposing log that introduces the latter end of the life cycle and teaches readers that there's more to rot than meets the nose.

The Magic School Bus breaks down in front of a haunted house. Mrs. Frizzle and her students hear spooky sounds and learn about vibration, sound waves, and musical instruments.

Ms. Frizzle's class learns about decomposition on a field trip to an empty lot.

Ms. Frizzle's class learns about how sound is made when they spend the night in a haunted sound museum.