A cute 3D rendered cartoon boy, wearing an olive green jacket, khaki shorts, and a beige baseball cap. He has large, expressive eyes, a friendly expression, and carries a brown backpack. He's wearing off-white sneakers. The style is reminiscent of 3D cartoon character design, with smooth, polished textures and no visible brushstrokes. The background is a simple beige color, focusing all attention on the character. The lighting is soft and even, creating a warm and pleasant atmosphere. The overall style is cheerful and friendly, suitable for children's products or game character design. The image is rendered in a style similar to contemporary 3D animation character design. Think of the clean lines and smooth surfaces of Pixar-style animation, but with a slightly more realistic rendering of the materials.

Doctor