How can I relieve a toddler' stuffy nose?

Alexis wanted to know, "What is the safest way to treat congestion in a toddler?" 

Dr. Sue writes:

Well the safest way to treat it is to use a nasal saline spray or saline mist. It helps to break up the mucus and loosen it, making it easier to suck it out with an aspirator or maybe teach your child how to blow their nose.