You thought a trip to the science museum would be a quiet afternoon, but everything changes when Arnold accidentally swallows the Magic School Bus. Now, instead of looking at boring exhibits, you and Ms. Frizzle's class are taking a heart-stopping field trip right inside Arnold's actual body. Shrunk down to microscopic size, you will travel straight down his esophagus and splash into his stomach. Discover the fascinating science of digestion, ride along through the rushing bloodstream, and see exactly how the heart pumps and muscles work from the inside out. Poor Arnold just wants a normal school day, but he is giving the class the ultimate biology lesson. This beloved science adventure mixes laugh-out-loud humor with incredible facts about human anatomy. Buckle up for an unforgettable journey that makes learning about biology the most thrilling ride of the school year.