Create a 3D rendering of a beef leg piece in a whimsical Disney style, focusing on bright colors and a fun atmosphere. The beef leg should be depicted in a close-up view, showcasing its vibrant, cartoonish surface in shades of deep red and marbled pink, with exaggerated features that make it appear friendly and inviting. The bone should protrude prominently, stylized with a smooth, rounded shape that adds to the playful aesthetic. The texture of the meat should be simplified yet colorful, with highlights that suggest juiciness and freshness. The background must be transparent, allowing the beef leg to stand out as the focal point. Bright, cheerful lighting should illuminate the piece, creating a lively and engaging look that is perfect for use as an object in children's books, animations, or fun food-related projects.