Going to Giants game (never been) questions???

I live about 5 hours (driving) away but my son just turned 10 and I want to take him to a home game. The December 4th game against the Giants works best for me. We're going to stay at the Hyatt near the stadium and spend the weekend in Pittsburgh as well.

My first question is where to sit at the game (I've never been there). I'm looking at sections 121 thru 125 in the end zone because I want my son to have his first experience be a great one. Has anyone ever sat down there?

Second question is what to do in that area? Any suggestions on food and fun?