Why do I have to go to sleep? What happens when you sleep? Where do animals sleep? What are dreams? These curious questions are explored through delightful illustrations, intriguing flaps and simple words. This friendly and approachable book takes a closer look at what is sleep and why we need it. The latest addition to the popular Very First Q&A series, following on from What is Poo?, What are Germs? and What are Stars? Charming illustrations by Marta Alvarez-Miguens and large flaps for inquisitive little fingers make it all the more apt and appealing to young children.