I would definitely say the answer is yes if it is "make a wish" and not "starlight".
I have a little client who has leukaemia and she was just granted a wish. She could do, be, meet or have anything. She chose to be a princess and to have a princess ball. Make a Wish organised it at the Hyatt here in Canberra, there was a photographer, news crew, handmade gown for little girl, amazing food, dj, and her favourite bit, a horse drawn carriage for her to ride in.
I am sure a trip to Disneyworld would not be out of the question if they can do the above.
Click this link to see the Princess ball which was on the today show last week. It was such a special day:-
http://www.youtube.com/watch?v=wQh-Pr23sJg