Just returned from WDW where we celebrated my DH's 48th birthday. When you check in at the hotel, let them know. I had goofy make a b-day wake-up call. The hotel delivered balloons and a card (no charge also). Each hotel also has their own bakery and I had them deliver a cake early (7am). It was perfect because they delivered it when he was in the shower. I also got him a button that says "today is my birthday". You can find these at all of the parks right inside the gate at guest relations. (I did obtain his a few days earlier so he could wear it all day). All day long, the CM's wished him a happy birthday. A couple of characters in the parade also spotted him and pointed right to him. When I made dinner ressie's I let them know and when we were sat, there was confetti all over the table and they brought him a special cup-cake with a candle. Disney really made his day special.