K really got into the Magic School Bus books when he noticed that there is a lot of information within the book about certain animals or science or whatever fun filled adventure the kids get to go on.
The books are always filled with fun facts about whatever adventure the kids and Ms. Fizzle go on. In this story they are learning about bats that are near one of the student's home. We learn how bats sleep, how they can find their food and other interesting facts about bats.