Front and center of the card, illustrate a cheerful, oversized, and highly detailed cute crab character, nestled on a sunny beach. The crab should be vibrant orange with playful googly eyes and a wide, comical grin, holding a tiny pastel-colored party hat askew on its head with one of its claws. Its other claw should be holding a miniature blue balloon, tied to a string.

The scene is set against a backdrop of soft golden sand, textured and detailed with small shells and pebbles scattered about. In the distance, gentle ocean waves ripple towards the shore, their shades of aqua and teal blending with hints of white froth.

Above the crab, illustrate a whimsical banner strung between two small driftwood poles. The banner is a series of colorful pennant flags—each one a different color, such as lemon yellow, sky blue, and bubblegum pink—fluttering in an invisible breeze. The words “Happy Birthday” are cheerfully scrawled across the flags in a lively, bold font.

To the side, there’s a small, whimsical beach table made from a flat stone resting atop two sturdy rocks. On the table, place a simple, small round cake frosted in a sky blue shade. A single, lit candle stands at the center, flickering in the imaginary seaside breeze. The cake has the name "Christina" delicately piped in elegant, white icing letters.

Include a sky with wispy, whimsical clouds and a soft golden glow suggesting a late afternoon sun setting over the horizon. The sun’s rays create a halo effect, subtly bathing the scene in a warm, inviting light.

Throughout the illustration, employ a rich, hand-drawn line work reminiscent of Quentin Blake’s expressive style, combined with the detailed whimsy of Beatrix Potter's characters and setting. This will add both depth and charm to the card, making it a delightful visual feast that captures the playful spirit of the birthday celebration.

Generated with these themes: Cute Crab, and Happy Birthday.

Made with ❤️ by AI.