"Sleep is something every human on Earth does. It's needed to embrace a new day feeling refreshed, and to help us perform crucial functions well. This book introduces young readers to the importance of sleep. It explores through engaging color photographs the stages of sleep, the consequences of not getting enough sleep, and the benefits of getting the right amount of sleep each night. Glossary terms help readers navigate and process new concepts, and age-appropriate language makes the material easy to access and comprehend, giving the reader a full understanding of this key ingredient to a healthy life." -- Provided by publisher.