Design: The astronaut theme is likely to be appealing to kids who are interested in space and adventure. The blue color can be both vibrant and easy to match with various outfits. Material: Ensure the backpack is made from durable, high-quality materials to withstand daily use. Look for water-resistant or waterproof materials to protect the contents from spills and rain. Size and Capacity: At 16 inches, this backpack is suitable for school-aged children, typically fitting A4-sized books, notebooks, and other school supplies. Check the internal compartments and pockets to see if they provide adequate organization for items like pencils, lunch boxes, and water bottles. Comfort: Look for padded shoulder straps and a back panel to ensure comfort, especially if the backpack will be used for carrying heavier items. Adjustable straps are important for a good fit and to grow with the child.