If your child has a stuffy nose, you may want to use a little bit of saline solution and a bulb syringe to help clear their nasal passages. But if your child is old enough to learn how to blow, you can begin to teach your child how to do this. One way to help them is to hold a tissue over their nose and instruct them to blow bubbles with their nose. Using a humidifier at night also can be useful in keeping mucus thin enough that it can be removed by blowing or by using a syringe.