As of 2015, Youtube has full "Magic School Bus" episodes available on its Magic School Bus channel. The site TV.com has over 30 episodes of the show available for viewing.
The Magic School Bus is an American-Canadian animated children's television series based on the book of the same name by Joanna Cole and Bruce Degen. The show follows the adventures of Valerie Frizzle, an eccentric third grade teacher at Walker Elementary School, as she takes her class on wondrous educational field trips with the help of a magical school bus. Scholastic Entertainment produced 52 episodes of "The Magic School Bus" divided in four seasons.