This place is great for kids. They do a good job of maximizing the limited space, but you can go through the entire aquarium in a couple of hours, maybe even an hour and a half. The most noteworthy part of the aquarium was probably the glass tunnel, where you can sorta fool yourself for a second that you're immersed underwater.
I'd like to come back here with my nephew when he's a toddler, and I'd be paying admission mostly so I can see his reactions. Otherwise, I wouldn't go back.