Peddler's Village in Lahaska (waaaaay outside Philly) was one of my favorite haunts as a child. There are plenty of cute little shops that have been there for years. It's somewhat spoiled by the fact they expanded the shops and put in outlets (but now there are outlets!). It's still fun to stay in PD proper and see the older shops. They also have a lot of great festivals including The Teddy Bear Picnic, The Strawberry Festival and the Scarecrow competition. They have some decent American style restaurants that have seemingly avoided the temptation of inflating prices to gouge tourists. (See, Cock and Bull, Spotted Hog, Hart's and the Pub). One of my favorite places to visit is Morrow's Nut House.
They added a carousel for children about 15 years ago? A must for families.
Peddlers Village is in Lahaska, Bucks County, just north of Philly. Its just a delightful little village of shops which was the inspiration of Earl Hart Jamison in 1962. It used to be a chicken hatchery and barn but Earl transformed them, trying to create an architectural style of colonial America. There are wonderful winding brick paths and manicured gardens in an around the shops.
Slice of Americana. Handicrafts are sold in this Philadelphia suburb. Nice place to stroll with families.