The Magic School Bus S03E09 - Works Out
The Magic School Bus (1994)
S03E09 Works Out
Episode Overview
Can Mr. Sinew compete with the Friz? During this year's "Teacher-athlon," the students worry that Ms. Frizzle might be outmatched by the brawny gym teacher from a rival school. To ease their concerns, the class embarks on an adventure inside Ms. Frizzle's body for a fascinating exploration.