A charming minimalistic pattern for a children's t-shirt design, portraying an underwater scene filled with serene beauty. Graceful fishes of various sizes swim amidst delicate aquatic plants, while a diver explores the tranquil depths. The design features a predominantly light blue background, creating a sense of calm and tranquility. Rendered in a clean and simple clipart style, with minimal lines and subtle colors, this t-shirt design captures the essence of the underwater world in a minimali