"Children's book about rain" suggests a story aimed at young readers that focuses on the theme of rain. It could explore how rain forms, its importance in nature, and how it affects the environment. The book might feature playful illustrations, simple language, and characters that help children understand the water cycle, the feelings rain evokes, or how animals and plants depend on rain. It could also include fun, interactive elements like a narrative about kids playing in the rain, animals seeking shelter, or imaginative stories of where raindrops come from...