Children's style illustration

Please generate an illustration of [theme/subject], with an overall whimsical, childlike style typical of picture books: outlined with loose black ink sketches, without overly realistic details; layered with soft watercolor washes and splatters, featuring clean, warm colors with a slight paper texture. The image's atmosphere is suitable for postcards, children's picture books, Christmas advertising campaigns, or emotional editorial illustrations, conveying sincerity, healing, and a touch of nostalgia. The composition should be simple, with comfortable white space, and the main subject clearly highlighted. Avoid photo-like textures, 3D rendering effects, and overly sharp details. Do not include watermarks or logos.