Jauronimo made me legit laugh here in the office.
No kids for me yet, but I did take my nephews and niece to last year's Philly game. My nephews are 12 and 14 while my niece is 16. They all had a blast, even my niece who really isn't a sports fan but she had a lot of fun tailgating. As people have mentioned, its all about the section you're in. I managed to get tickets in my old season section (331) which has always been very good and mostly idiot-free. I knew as long as nothing radically changed over the last year, it would be a good section for them to sit in. I was more worried about visiting Eagles fans being jerks than drunk Bills fans, but luckily most Eagle fans I saw there were sad and sullen so it never really factored in.
Find a good section, stay out of the Rockpile and you're golden.