If you've never been, the New Jersey Aquarium down in Camden -just outside Philadelphia, is fantastic fun. Great place for kids. Even better place for taking pictures of sea life.
I had a speaking engagement down in Philly this week, so I packed up the family and spent the better part of Sunday at the aquarium and was pleasantly surprised. Get there early. Lot's to see; indoor/outdoor exhibits, IMAX theatre, even the food court had good eats! Family friendly.