An illustration of a friendly and diverse group of four children playing together in a park. Each child is engaged in a different activity like playing ball, flying a kite, reading a book, and drawing, showcasing the various aspects of being 'four' - a balanced and harmonious group. The setting includes vibrant colors and a sunny day background, emphasizing the idea of 'four' as a well-rounded and versatile number. The style is lively children's animation with exaggerated expressions and actions to highlight the diversity within the group of four.