Whimsical Watercolor Planet with Smiling Sun

whimsical children's book illustration of the top of a small round planet with soft watercolor continents and pale blue ocean, a cluster of rounded green trees growing along the curved horizon, simple dark branch lines and thin trunks, smiling golden sun in the upper right with tiny rays, a few small white puffy clouds, lots of empty pastel sky space, gentle hand-painted watercolor texture on paper, minimal cute style, soft edges, subtle grain, airy composition, warm and calming nursery art