Playful, cute birthday cartoon with exaggerated proportions, thick black outlines, and bright saturated colors. Vertical full-bleed scene in a sunny park: a beaming big brother (kid, oversized head, wide grin, chunky sneakers) sprints forward in an energetic pose, pulling a shiny red wagon with swoopy motion lines. In the wagon, his giggly little sibling (toddler) wearing a tiny party crown tosses confetti and clutches colorful balloons; a wrapped present and a cupcake with a candle sit beside them. A smiling star-shaped kite arcs overhead with a twisty tail; rainbow bunting stretches between stylized trees, puffy clouds, daisies, butterflies, and a jump rope dot the grass to emphasize “playing outside.” Warm, radiant sunlight, soft highlights, long bouncy shadows. Palette: cherry red, sunshine yellow, lime green, sky blue, bubblegum pink. Whimsical, energetic poses; clean background details to keep focus on the siblings. Add one small hand-lettered caption at the bottom center in playful bubble letters: “Happy Big Bro-day!”

Generated with these themes: Big Brother, playing outside, and .

Made with ❤️ by AI.