a playful scene in a detailed line drawing for coloring.

In a whimsical line drawing, a cheerful cartoon cat, with oversized paws and a playful expression, skillfully shapes towers and a grand moat for its sandy fortress as the gentle waves whisper nearby. Surrounding this sandy kingdom, palm trees sway slightly in the warm breeze, sunbathers recline on vibrant towels, and colorful seashells dot the shoreline, all bathed in the soft golden hues of a setting sun that casts a magical glow across the beach.