The kids from Ms. Frizzle's class learn lessons about why objects float or sink when they board the Magic School Bus--tranformed into a bus-boat--to investigate a report of a monster living in Walker Lake.
General Note
At head of title: Scholastic's.
"Based on the episode from the animated TV series produced by Scholastic Productions, Inc. Based on The magic school bus book seires written by Joanna Cole and illustrated by Bruce Degen"--T.p. verso.