That's what I want to do for my birthday weekend. I adore anything to do with animals so I wanted to spend a day at the aquarium with my husband. We are going to the Adventure Aquarium on the Camden Waterfront (right across the bridge from us in Philly). I have been there once, but he has never been there... it is the most awesome place. They have hippos, free flying birds, and a shark tank that is designed as a tunnel, so you actually walk through it and the sharks are swimming over your head. It gives the illusion that you can actually touch them. Ooooh, I'm so excited... we are leaving now.