About 30 minutes from the hotels, Peddler's Village has a variety of unique shops in an 18th Century setting. Peddler's Village runs seasonal competitions yearly (Gingerbread houses, Scarecrows, etc.) In June, they will have all the entries for the Sand Sculpture contest on display!
New Hope, PA & Lambertville, NJ are fun towns with lots of funky stores. They're directly across the Delaware River from one another and you'll get great views of the river while going over the bridge. They are roughly a 40 minute drive from the hotels.