"What Happens When We Sleep: 80 Questions For Curious Kids and Teens" is an informative and engaging book for kids who want to learn more about the science of sleep. Written in a question and answer format, this book covers everything from the basics of why we need sleep to tips for getting a good night's rest.Readers will discover fascinating facts about the stages of sleep, what happens to the body and brain while we are asleep, and why some people have trouble sleeping. They'll ...