Picture a joyful scene set in birthday-themed illustration. U-boats, having been transformed into charming animated characters, possess large, inviting eyes and are festooned with balloons and streamers. They appear to be embarking on an exciting voyage, in the company of grinning sea creatures and partnered with luggage festooned in travel stickers. Above the serene sea, a hot air balloon elegantly drifts in the sky, trailing a banner with the inscription 'Happy Birthday,' thus merging the theme of travel with the celebratory event.

Generated with these themes: U boats, and Travel.

Made with ❤️ by AI.