Theme: The rainbow design is likely to be vibrant and appealing, especially for kids who love bright colors and cheerful patterns. Color: Purple as the base color can be a favorite among many children and can complement the rainbow design nicely. Material: Ensure the backpack is made from durable, high-quality materials that can handle daily wear and tear. Look for materials that are water-resistant or waterproof to protect the contents from spills and weather. Size and Capacity: At 16 inches, this backpack is suitable for school-aged children, accommodating A4-sized books, notebooks, and other school supplies. Check for multiple compartments and pockets to help organize items like pencils, lunch boxes, and water bottles.