The last time we were there (Nov 2003), they were still doing hair wraps at MK near the Pirates of the Carribbean attraction. DD had to have hers done and I think it cost $25. She has shoulder length hair and got lots of beads.
I will not let her take it out for several weeks since it is not cheap to get one. I would recommend, however, that you get one behind the ear (underneath the hair) rather than on top of the head. She always insists on getting one that starts up on top of her head and when we cut it off, she has this weird little piece of hair that has to grow back! LOL