Thank you all, that gives me a lot to think about. Now if only I can keep the secret myself. One other question- this trip (in Sept) is for both kids birthdays. One has a Sept birthday, the other October. Any suggestions on how to make it special? I know about the buttons but I'm thinking about getting something put in the room before we arrive. Would POR do something like that and would it cost me a fortune?
You can do something through Disney, but it is quite expensive. Many people have recommended doing Memories by Betsy.
It won't be placed in the room until after your room is available; not before you arrive. But if you don't go into your room for some time after you receive the text, it may be there.
You can also get someone to take the kids to the pool and you can decorate the room yourself for very little cost.