I am assuming that you are looking for your disney vacation...
We have used Kids night out and were thrilled with them. The first time we used them our son was 10 months old and we also used them when he was 14 months old. We were every satisfied with them. They were extremely professional. We have used them for various amounts of time I do think there is a minimum amount of time you can use them. But i am not sure. Good luck.