We will be celebrating DS's birthday at WDW. We're already doing a few special things - MVMCP, HDDR, etc., but I'm thinking of creating a certificate for his actual birthday gift giving him a choice of certain special experiences. But I'm a little worried about availability if I give it to him while we are there and let him choose. I was thinking along the lines of some of the tours, or something like a fireworks cruise or Pirates cruise. Does anyone have any suggestions for things that might be available on short notice like that? Or a different suggestion for the gift itself?