Ms. Frizzle orders skeleton costumes for her class, and they discover that some of the bones are missing. When they head out to look for them, they learn something about their own skeletons.

Ms. Frizzle's class travels to Australia to search for the kookaburra, encountering kangaroos and Tasmanian devils along the way.

Ms. Frizzle takes her class back through time to the Triassic period on a dinosaur dig in search of Maiasaura eggs.

Miss Frizzle's class travel under the ocean.

Ms. Frizzle's class blasts off for another adventure to learn about light and color, but Ralphie, who is always late, becomes concerned when Ms. Friz announces that there will be relay races.

Ms. Frizzle takes her class into an electrical storm so that they can learn about lightning, what causes it to occur, and safety measures to keep from being struck.