professorandmom, they will put the bracelets on the kids when you checked them into the club for the first time.
We went on 8/7 and they were registering the kids at the terminal in the port, we did all of the paperwork there (it only took 5 minutes) and got the beeper, then that night when the kids go to the club they will the bracelet.....
It was very easy and quick.
You also have to give a password when you get the kids out, which I really liked, no one else can get the kids.