The Magic School Bus on the Ocean FloorPaperback, 1 July 1994

Wowee! A class trip to the ocean! Finally, the kids in Ms. Frizzle's class are going on an ordinary field trip, just like everyone else. But when the Friz drives onto the beach, across the sand, and straight into the ocean water without stopping, the kids know that they have once again embarked on one of Ms. Frizzle's crazy class trips.