Have you ever wondered how soap cleans your hands, or how eating healthy makes your body stronger? In the How Do series, readers are invited to guess and then explore the science behind the right answers. How does medicine work, the significance of hand-washing, or why exercise keeps you energized? This fully illustrated picture book explores the science behind basic health habits through diagrams, photos, and informative and engaging text, in this newest addition to the How Do series. About the How Do series: These visually appealing STEM titles for inquisitive readers and young science enthusiasts, are fully illustrated nonfiction picture books that are a great introduction to various STEM topics. Each title includes facts and figures, simple diagrams and hilarious illustrations and is written in a question-and-answer format to encourage readers to ask questions and guess the answers before exploring the science behind the correct answers.