Ms. Frizzle takes her class on amazing field trips in the Magic School Bus. They never know what will happen when they get on the bus, but they always learn something new about science! In THE MAGIC SCHOOL BUS CHAPTER BOOK #6: THE GIANT GERM, a class picnic in the park becomes an exploration of the mini world of microbes. Even though microbes are tiny, they have huge effects on the world. Ms. Frizzle and her class get into trouble when they run into a giant germ!