The Magic School Bus Rides Again Theme Song - Ms. Frizzle's kid sister Fiona takes the wheel at Walkerville Elementary, leading the class on wild adventures packed with science-fueled fun.

The Magic School Bus Rides Again is a Canadian-American animated children's web series, based on the book series of the same name by Joanna Cole and Bruce Degen.

In the sequel to the original series, Valerie Frizzle retires from teaching and passes the keys of the Magic School Bus over to her younger sister, Fiona Frizzle, to embark on new adventures with her class. As they journey on their exciting new field-trips, they discover new locations, creatures, time periods and more to learn about the wonders of science, educating viewers along the way.