In the center of the greeting card, illustrate a vibrant, cartoonish swimming pool scene. The pool should be oval-shaped with clear blue water, with exaggerated, oversized ripples akin to Bill Watterson's dynamic style. Around the pool, place large inflatable floaties, like a giant pink flamingo and a yellow rubber duck, adding a playful touch inspired by Charles Schulz's iconic simplicity.

On the left side, draw a colorful cocktail bar, reminiscent of a tropical paradise, with a thatched roof and wooden counter. Line the counter with cartoonishly oversized cocktails in a rainbow of colors: a bright red strawberry daiquiri, a vivid blue lagoon, and a deep green mojito, each with a tiny, whimsical umbrella.

To the right, depict a sun-drenched, sandy area resembling a holiday beach, dotted with loungers featuring vivid striped patterns. Scatter beach balls in primary colors around this area, evoking the lively spirit of Osamu Tezuka's manga charm.

For the birthday theme, position a massive, multi-tiered cake beside the pool, with each layer frosted in bold, eye-catching colors—deep purple, bright orange, and lime green. The top of the cake features an oversized "19" candle blazing with cartoonish yellow and red flames, inspired by Gary Larson’s exaggerated style.

In the sky above, draw a banner stretched across two palm trees, with "Nelly" painted in bold, whimsical letters, each character decorated in a unique pattern of polka dots, stripes, and stars, echoing the creative flair of R. Crumb’s comix.

Fill the background with rolling green hills and fluffy white clouds that capture the essence of Winsor McCay's dreamy landscapes, creating an inviting and fantastical setting for Nelly’s 19th birthday celebration.

Generated with these themes: Swimming pool, Holiday, Cocktail bar, 19th Birthday, and Cake.

Made with ❤️ by AI.