Hi Caroline,
About 2 weeks ago, my girlfriend had her son's 2nd birthday, in Whitestone, and she had it at this place call The Little Gyme. All the kids enjoyed themselves, and she rented the place for 2 hours on a Sunday, they have people there entertaining the kids, it is like a big gymanstic's room, because he has all of these thick covered foam mats and they can run around and jump and fall, and they do not get hurt. My son is only 19 months and he was almost the youngest one there, and he had a blast running all over the place. I do not have their phone number, but if you call information or do a search on the computer, you will be able to get their number. I do not know what it costs, but I am sure that whatever it is, it is worth it because everything is done at that location and they clean-up after and you just get to go home.
Hope this helps.
R.