Design a set of playful and highly decorated birthday cards for kids featuring M

Design a set of playful and highly decorated birthday cards for kids featuring Marvel superheroes reimagined as adorable animals. Each card should show characters like Spider-Man as a clever spider, Iron Man as a sleek robotic cat, Captain America as a brave eagle with a star-shaped shield, and Thor as a mighty lion with a mini hammer. The cards should be filled with colorful, detailed decorations like stars, lightning bolts, and comic-style speech bubbles, with the animals in dynamic poses. Include fun, bold birthday messages in lively, cartoonish fonts, surrounded by festive elements like balloons, confetti, and streamers to create a joyful and engaging experience for young animal and superhero fans alike