If you looking for a great place to experience traditional Philly cheesesteaks, you should definitely give Cleavers a try!
http://www.cleaversphilly.com/
Cleavers is a no-bull cheesesteak shop located in the heart of Center City Philadelphia. We’re talking 100% USDA domestic ribeye, fresh baked bread, and artisanal ingredients—all culminating in a delicious Philly Cheesesteak.
We went to Cleavers last night after spending a few hours at the Franklin Institute. https://www.fi.edu/
The atmosphere was hip and clean. It was also very kid friendly. You eat upstairs if you want to dine-in. You order downstairs. There's plenty of napkins and ketchup available. Both are a must with my kids.
They have a 4.5 start rating on Yelp. https://www.yelp.com/biz/cleavers-philadelphia and a two $$ price rating. That would be the only complaint I have about the place...it was a bit pricey for my "taste". But if you want a truly Philly Cheesesteak experience, you have to be willing to pay for it.
If you're ever in Philadelphia, you should definitely give it a try!
With Love,
Chris