The Cyldesdales weren't there in Aug. The barn was all locked up.
The Pets Rule & Sea Lion shows are good too. I love the rays even without feeding them you still see them up close. The starfish exhibit is good with hands on opportunities.
Since your DS likes sharks then you'll have to see the sharks. There's a moving sidewalk thru the aquarium so you'll see the sharks swimming over your head.
Wild Arctic is one of my favorites. There's a motion & non-motion ride. It's like a helicopter simulator. This is where you'll find the bulagas, walrus & polar bears. Next to the wild Arctic is the penquin house. They're so funny to watch.
I saw the dolphin show twice and didn't really like it, not enough dolphin appearances. My son 14 wasn't thriled with it either.
Not sure how late it's open in Sep but we can spend the entire day, open to close, in the summer.
You'll have so much fun with little eyes. Oh yeah don't forget about the Sesame Play area, but only after you've seen all the other stuff otherwise the kids won't want to leave it. Pick up the map and plan the shows and hopefully seeing the rest will fall into place.