Kids have 20 baby teeth. They start falling out at around age 5 or 6.The books in this series help young readers learn about the best ways to stay healthy. They also offer a comforting introduction to what might happen when something unexpected-like a cold or a broken arm-comes along. They give an early introduction to science topics thank to the wonderful see-inside illustrations and easy to understand text. Key Features:Fast facts offering fun, sometimes little-known facts about the subjectSee-Inside illustrations with call-outsYour Turn section which includes:-Interactive quizzes that help readers retain the information they've just read-Activities that make kids get up and exercise their bodies-as well as their brainsStrange But True! which highlights more obscure information about the subjectJust for Fun which features two silly riddlesGlossary with pictureswww. factsfornow. scholastic. com See inside front cover for more information. | I Lost a Tooth (Rookie Read-About Health) (Library Edition) by Lisa M. Herrington, Hardcover | Indigo Chapters