We spent a week in NYC when the kids were about 18 months and 4 and we really enjoyed it. We stayed about 1/2 way between central park and Times Square so we could walk to those and we had a fun time visiting the Natural History Museum, Central Park Zoo, playgrounds in the park, carriage ride around the park, Toys-R-Us and all the bright lights of Times Square. We went up the Rockerfeller Center and the kids weren't loving it but they didn't mind either and we enjoyed the view. We caught the subway once to go down and look the Statue of Liberty and they enjoyed the ride and running around the waterfront. The only real issue for us is that is was really loud and pretty overwhelming so we went out most mornings then spent most the afternoon hanging out in our teeny little 1 bedroom apartment and chilling out.