A vibrant cartoon with colours and smooth animation. Create a 3D cartoon animation about a poor little boy named Leo who finds a lost puppy in a rainy city. He takes the puppy home, gives it food and shelter, and searches for its owner. The next morning, he finds the puppy's worried little girl owner. Leo happily returns the puppy, and she thanks him with a big smile. Warm emotional ending, colorful 3D cartoon style, expressive characters, cinematic camera movements, smooth animation, and cheerful background music.