In the sequel to the original animated series, the flagship Valerie Frizzle (now Professor Frizzle) gets her Ph.D. and retires from teaching at Walkerville Elementary School. She then hires her younger sister, Miss Fiona Frizzle, to teach the class, and passes the keys of the Magic School Bus over to her. The kids journey on exciting new field-trips, discovering new locations, creatures, time periods and more to learn about the wonders of science, educating viewers along the way, on the eponymous Magic School Bus.