Unicorn Rainbow River Illustration | sylvester and the magic pebble by william steig

Children's book illustration of: unicorn rainbow river. Age group: adult-friendly children book, digital cute pixar style, heroic brave mood, forest green palette. Charming character design, age-appropriate composition, warm storybook lighting, no text overlays, no watermarks. Wholesome family-friendly. No scary content for younger ages. No copyrighted characters (no Disney / Pixar / etc.). Specifically: unicorn rainbow river. Target search intent (rendered visually, no on-image text): "sylvester and the magic pebble by william steig" (en).