One thing that I would caution, however, is not to expect that any of these things will definetly happen. Get the birthday button, note it in your reservation and when you arrive and if something happens, great. If not, you're still at WDW. Don't set yourself up for disappointment by thinking that something great will happen, because it might not. Think of it as pixie dust - maybe yes, maybe no. Enjoy your trip whatever happens!