At the top of the Cartoon Style image, "Happy 18th Birthday Sam" in giant bubbly surf letters with thick black outlines, glossy highlights, and a slight wave-arch across a bright, sunny sky.

Playful, funny cartoon beach scene: a lanky 18-year-old teenage boy with exaggerated proportions and a huge grin is belly-sliding down a slick, chocolatey mud ramp from a grassy dune straight into the turquoise sea. Mud splatters arc in chunky, shiny blobs, outlined thickly, while dynamic speed lines emphasize his whooshing descent. He wears vibrant striped board shorts, a crooked party hat, and has comic mud streaks on his cheeks and elbows; his legs kick up behind him in an energetic pose. The sea explodes with oversized, foamy waves—towering teal curls with bright white froth, thick outlines, and sparkling highlights—ready to gobble him up in a joyful splash. A bright sun beams down, puffy clouds float overhead, and goofy seagulls in tiny party hats hover, one snapping a pic. On the water bob an orange inflatable “18” and a rubber duck ring, while a cheeky crab on the shore holds a mini flag. Colors are saturated and punchy, outlines bold and graphic, with playful cel shading, whimsical details, and a dynamic, diagonal composition that feels mid-action, edge-to-edge.

At the bottom, a small wooden beach sign with chunky hand-lettering reads: “Surf’s up, mud’s down!”

Generated with these themes: Teenage boy playing in the sea, Sliding in the mud into the sea with large waves, and .

Made with ❤️ by AI.