We're a family of 2 adults and 2 kids (10,4yrs) on a road trip and will be exploring Philly in the last leg of our trip, last week of Jun. We've already planned to visit Philly city, Lancaster, an outlet mall, Morey's Waterfront Amusement Park and perhaps Cape May (is the sand nice there?) What else is interesting outside of Philly? We're open to all suggestions. We'll be flying off from JFK airport on the last day.