The zoo and aquarium were a cheap and a likable place to be active and entertained. My favorites were: the Dwarf Cuttlefish which is NOT a fish but more like a small octopus and squid. I love how he glides through the tank. The cheetah with its distinctive eye marks and spots. The African elephants with their soulful eyes and super cool trunks to suck up haystacks. The monkeys because they are so funny and interact like a comedy show.
The walking trail is easy to follow, parking was free and the cost was worth the day we spent on our Saturday. The only negatives were that there weren't any cool shows or lack of info on them and no paper map. Also, it has a few incline problems for stroller pushers or guests with handicaps. There is a tram car on the weekends though.
We chose the zoo/aquarium over the more pricy museums and had no regrets. Although we didn't bring kids, families seemed to really love it too.