The Magic School Bus Blows Its Top: A Book About Volcanoes (Magic School Bus) (Magic School Bus TV) by Gail Herman & Joanna Cole

Ms. Frizzle's class is having a hard time putting together a giant globe of the world. A piece is missing...an island so new it hasn't been discovered yet! Before they know it, the kids are beneath the oceans's surface, exploring an underwater volcano. Join the class as they learn about volcanoes.