We've taken our child twice on his birthday. The 1st time we stayed at Animal Kingdom. When we checked in, they gave him a very nice personalized hand-autographed photo of the "Fab Five". We had also called ahead of time to the shop in Downtown Disney that does the customized spray-paint shirts (can't remember the name, sorry!), and had a Mickey Mouse birthday shirt made for him to wear on his special day. We'd had the idea for him to get it autographed by all the characters he met throughout his birthday, but didn't think about that he'd have to take off the shirt to get it signed. (Wear two). Cast members will usually do special things when they see the previously mentioned birthday pin: We got off the Snow White ride, and a cast member saw his pin, asked if he'd ridden Dumbo yet, and escorted us all straight to the front of the line in the middle of the crowded day. Our son also got to be in the Halloween Parade, although they didn't know it was his birthday, it worked out really cool. Because they saw his t-shirt, the cast of the Jungle Cruise all sang happy birthday to him on the ride. The 2nd time, we stayed at the Polynesian, and when we came home the night of his birthday, there was a VERY nice Mickey Mouse cake, birthday hats, balloons floating off the chairs, and noisemakers, complete with REAL plates and silverware. It was SO nice. Also, both times, he had a hand-signed birthday card with his favorite character waiting. So basically, just let someone know ahead of time, and though it may vary, the castmembers are quite good about doing something special for the birthdays. There's nothing official, but it's still pretty cool.