This entry in the 10-book series explores the science, physiology, symptoms, treatments, and main causes of common ailments. Colds, bellyaches, diarrhea, earaches, flu, skin conditions, allergies, germs, viruses and a glossary of types of doctors are featured. Humorous poems appear throughout and the book is topped off with Note to Parents from the author/physician and a page of simple activities and kickstarting questions that expand the child"s understanding of the subject matter.