@littleman -- The common nasal polyps symptoms apply to both adults and children -- that is, runny/stuffy nose, headaches and sinus pressure, and a decreased sense of taste and smell. As for the snoring, that could be caused by swollen nasal polyps, but it's more likely it your daughter's snoring pattern has just begun, or changed recently.
I wouldn't advocate going to surgery as your first option; especially since your daughter is so young. It's much more likely that your physician or pediatrician will put her on drops instead, and only start considering surgery if there are no signs of improvement.
I know kids hate this, but allergy shots can help too.
Best of luck.