Pat's Cheesesteaks in South Philly! Outdoor only seating, so the wintertime may be tough with the kids. Make sure you get your order set before you go to the window, or you're liable to made fun of. :) http://www.patskingofsteaks.com/
Reading terminal market. It's an attraction in itself, but it's a great place to take the kids for lunch. There are food stands that dish out regional favorites like cheesesteaks but also a variety of ethnic foods. The Amish Bakery is to die for. The market is also very fun to explore.
TrayKit, a beautiful combination of organization and entertainment
Britax Frontier 85 SICT - Side Impact Protection Technology in a car seat