Post Cruise NYC w/ toddler?

I'll finish up a cruise in NYC on a Saturday morning at 8:30 am and we our flight home is not until 5 pm the next day. It will be myself, my DH, and our 2 y/o DD. One thing we want to do for sure is spend some time in Central Park with the carousel. Our hotel will be within walking distance of Central Park (but I know it's a big place so I'm not sure if it's within walking distance of the park we'll want to see). What else could we do that would be fun for adults and tolerable for a toddler or vice versa? I know there are a lot of museums but I'm not sure if 2 is old enough to get much out of them.

Central Park also has a small zoo. http://www.centralparkzoo.com/

You can also take a horse and carriage which can be found right outside the park.

Keith