Create a full-color, professional kids’ coloring book cover for ages 4–8, “Calm Nature Coloring Book”, in friendly cartoon style, soft pastel colors, high detail. Illustration should feature: a large smiling sun over gentle rolling hills, 3 round leafy trees, 4 cheerful flowers, fluffy clouds, 2 butterflies flying, and a happy child sitting on grass. Composition: centered, visually balanced, calm nature theme, bright and cheerful mood, eye-catching for kids and parents. Include subtle shading, depth, and vibrant colors, but maintain soft pastel palette suitable for children. See more