N.H.
I took my son there for a 4 yr old birthday party. They all had fun. Some of it may seem a little depressing to the adults (ponies tied up to a pole all day, broken toys to play with, and dirty train ride displays) but I don't think the children minded at all. I will say that the train ride was a little morbid and it may scare some children. If you happen to have a nice day, the picnic areas are great.
Good luck!