Setup: This set requires no assembly. Simply unpack and it's ready for use. Fill the backpack, lunch box, water bottle, and pencil case with your child's daily essentials. Compatibility: The Slazenger Backpack and Lunch Box set is designed for "kids" and features a unisex design, making it suitable for a wide range of school-aged children. Care Instructions: To ensure the longevity and hygiene of your Slazenger set, proper care is crucial. - Backpack and Pencil Case (100% Polyester): Hand wash only. Use cold water and a mild soap. Gently rub soiled areas and rinse thoroughly. Do not machine wash, tumble dry, or use bleach, as this can damage the material. Air dry completely in a well-ventilated area, away from direct sunlight or heat. - Lunch Box and Water Bottle (PP & PE Plastic): Hand wash only. Use warm, soapy water to clean. For the water bottle, a bottle brush may be helpful for thorough cleaning. Rinse thoroughly and allow to air dry completely before storing to prevent odors or mildew. Do not place in a dishwasher or microwave. Avoid using abrasive cleaners or scrubbers that could scratch the plastic.