To use these sunglasses, simply place them on your child's face. Make sure the arms rest comfortably behind the ears. When not in use, keep them in a hard - case sunglass holder to prevent scratches. Clean the lenses with a soft microfiber cloth. Avoid using harsh chemicals or abrasive materials on the lenses. Also, don't bend the arms too forcefully as it may damage the spring hinges. Regularly check the hinges for any signs of wear and tear.