Annotation: "Bridges are an important part of how many people get from place to place. But how do they work and how are they built? From the very first bridges to the bridges built today, young readers will explore these important engineering marvels. Through a full-color step-by-step photographic guide, they'll learn how to build their own model bridge. With accessible text closely paired with photographs, young readers will deepen their understanding of bridges"-- cProvided by publisher.