I loved Buffalo Bills, we've done it twice and are donig it again when we go out there next week! I beleive there are special kids prices but not sure what they are. My one tip is to go with the flow with the cheering on, crowd actions etc- this is no place to be very aloof as its full audience participation mode! But its fab.
Only reason I'd say not do it is if anyone sufferes from severe asthma or other breathing difficulties, as it does get very dusty- especially when the buffalo come in!