Suggestions for my wife's 30th Birthday?

My wife’s 30th birthday is coming up in the next 2 weeks and I’d like to take her somewhere on the Northeast US coast for a few days. The main problem is that I have a 1 year old son, and she would definitely not want to leave him at home with our parents. So the place has to be 1 year old friendly in that we’ll need a place to give him an afternoon nap and have things to do that we can take him to. Anybody have any good suggestions. I’m struggling to find a good place to go since it’s winter.