Design an abstract pastel backdrop imbued with whimsical swirls and playful geometric shapes, manifesting a dreamy ambiance. In its midst, invent a charming cartoon character surfing on an exuberantly colored surfboard, embellished with festive birthday symbols including balloons, candles, and confetti. Buff up the surfing theme by including delightful sea creatures donning party hats, all arranged underneath a banner displaying 'Happy Birthday!' in an exuberant, bubbly font.

Generated with these themes: Surfing.

Made with ❤️ by AI.