Create a delightful coloring page of a cartoonish Great Wall of China specifically designed for children aged 2-4, emphasizing simplicity with only one trace. Ensure clarity with a large, clear space for coloring. Emphasize the iconic shape of the Great Wall, making it easy for young children to recognize and color. Encourage exploration and creativity as they engage in this fun artistic activity. The final artwork should be highly accessible and captivating, tailored to the developmental needs and interests of toddlers and preschoolers.