In a vibrant, dynamic cartoon scene perfect for a birthday card, the stage is set on a lush green hill with a whimsical twist. At the center, a large trampoline is placed, its fabric printed with a bold, swirling dragon design, echoing the adventurous spirit of Ninjago. Springing high off the trampoline, a Ninjago-inspired ninja character is mid-flip in an impressive aerial taekwondo kick, his masked face showing a playful grin. His outfit is a fusion of traditional Ninjago garb and a taekwondo uniform, featuring a black belt cinched tightly at the waist.

Surrounding the trampoline, several cartoonish, anthropomorphic balloons float gleefully, their expressions animated with wide-eyed excitement. Each balloon represents a different emotion or expression, reminiscent of a Gary Larson comic, their strings tangling playfully in the air. A vivid banner arcs across the sky, tied between two whimsical, old-style windmills in the distance, each with brightly colored sails spinning in the breeze. The banner reads "Happy Birthday, Rishaan!" in bold, cheerful letters, each word formed by unique Ninjago-style lettering interwoven with taekwondo icons like belts and kicking figures.

In the foreground, a curious squirrel, styled in a fashion akin to R. Crumb's exaggerated characters, is performing its own miniature taekwondo moves on a tiny trampoline, its bushy tail springing energetically. The sky above is a brilliant, cartoonish blue, with fluffy clouds forming playful shapes that suggest various elements of the scene – a ninja star here, a taekwondo belt there. A stylized sun, reminiscent of Winsor McCay’s work, beams warmly down, casting a golden hue over the entire scene. Hidden among the clouds, in a nod to classic Easter eggs from Hergé's Tintin, the word "Rishaan" can be spotted, creatively camouflaged as part of the cloud patterns, waiting to be discovered by the sharp-eyed birthday boy.

Generated with these themes: Ninjago , Taekwondo , and Trampoline.

Made with ❤️ by AI.