Whimsical Style Illustration

Please generate an illustration of 【theme/subject】, overall in the whimsical, childlike style of children's book illustrations: outlined with loose black ink sketch lines, avoiding overly realistic details; overlaid with gentle watercolor washes and stippling, with clean, warm colors and a slight paper texture. The mood of the image should be suitable for postcards/children's picture books/Christmas advertising campaigns/emotional editorial illustrations, with a sincere, healing, and slightly nostalgic atmosphere. The composition should be simple, with comfortable negative space, and the main subject clearly prominent. Avoid photographic texture, avoid 3D rendering effects, avoid overly sharp details. No watermarks or logos.