I was looking for a rainy day activity for my very curious and active 14 month old and decided on a trip to the aquarium. I loved that you could buy discounted tickets online and that my son was free! My son LOVED the aquarium...so much that I bought an annual pass on the spot (you can apply that day's admission to the cost of the annual pass). I also loved that the aquarium was actually inside the outlet mall and that the aquarium allowed in-and-out access all day on the day's admission...so we enjoyed the aquarium, walked around the mall, had some lunch and then toured the aquarium again. The aquarium itself isn't terribly large (so maybe he will bore of the attraction when he gets a little older) but it is very well stocked and very well themed. My son particularly loves the stingray tanks.
TIP: Aquarium opens promptly at noon on Sundays. We arrived at opening (twice) and have found it to be pleasantly quiet and empty. Later in the day it definitely gets crowded.