What keeps trees from falling over?How do skyscrapers stand so tall?What makes a bridge strong? Let's try it out! Let's Try It Out with Towers and Bridges contains fun-filled activities that encourage young children to use familiar and safe objects found in their homes or classrooms to make observations about how things work. Whether building a sturdy tower of blocks, creating a solid foundation with clay, or making a paper bridge span short and long distances without falling down, children will have fun while they begin to learn important and basic science concepts.In this innovative series for young children, acclaimed science writer Seymour Simon and Nicole Fauteux encourage children to explore the world around them as they play. Each book contains tips for parents and caregivers on how to create positive learning experiences for even the littlest of scientists.Charming and lively illustrations by New York Times best-selling illustrator Doug Cushman ensure that the LET'S TRY IT OUT series is as much fun to look at as it is to try out!