A cartoon boy waving his hand, with simple facial expressions and a black background. He is wearing a blue t-shirt with gray pants and purple shoes, with a smiling face. He has short brown hair and is depicted in the style of Disney Pixar characters. The full-body illustration should be suitable for use as an avatar or profile picture on social media platforms. Ensure that it captures his cheerful demeanor while maintaining vibrant colors to make him stand out against a pure white backdrop.