Using this mask and snorkel set is easy. First, adjust the straps on the mask to fit your child's face comfortably. Make sure the mask seals well around the eyes and nose to prevent water from getting in. Place the snorkel in your child's mouth, and they're ready to explore the underwater world. When using, remind your child to breathe slowly and steadily through the snorkel. As for maintenance, after each use, rinse the mask and snorkel thoroughly with fresh water to remove salt and sand. Let them dry in a cool, shaded place. Don't expose them to direct sunlight for too long as it might damage the materials. And check regularly for any signs of wear and tear, like cracks in the mask or holes in the snorkel.