In children's books, a header serves as an essential element that indicates the title of the book or the specific section being presented. Typically found at the top of the page, headers help organize content and provide clear navigation for young readers. They are often designed to be visually inviting, featuring playful fonts and colors that resonate with children's interests. Good headers can enhance engagement, guiding the reader through the story or topics effectively while promoting a sense of adventure and curiosity.