Design a colorful group illustration featuring six cartoon characters standing together in a vibrant, outdoor setting. The characters should vary in appearance: 1. One character wearing a long black coat and glasses with an expression of curiosity. 2. Another character with short, spiky hair and a cheerful smile, wearing a blue and white striped shirt. 3. A girl with long hair tied in a ponytail, wearing a pink dress and a friendly smile. 4. A character with round glasses, a baseball cap, and an oversized sweater, looking playful. 5. Another character with a wise demeanor, dressed in traditional attire, arms crossed, and smiling gently. 6. A small, round character resembling a stuffed toy, with big eyes, wearing a cheerful expression. Add a whimsical title at the bottom in a playful font, and ensure the background features rolling hills and trees, creating a cheerful atmosphere.