Something's rotten in Ms. Frizzle's class! It's "Accidental Science Project" day. The kids have to bring in the moldiest things they can find in their refrigerators. Everybody agrees that mold is just disgusting! But when they go on a field trip inside a rotten log, they discover that all that dead-looking stuff is actually alive, and it's pretty neat after all. Join the class on their "rotten" adventure, and learn about how nature recycles through decomposition. Designed to be accessible for younger readers, books in this series are easier to read and follow the plot of the popular PBS Magic School Bus television series, based on the original Magic School Bus books written by Joanna Cole and illustrated by Bruce Degen.