Is this for an adult or child's birthday? The S55 cake is great for a grown up/older kid birthday. If Black Tap Burgers is open by the time of your trip, the special shakes might make a really special birthday dessert for someone. (Adult shakes can have alcohol.) A super sundae at Ghirardelli's also can be a very fun birthday dessert for any age. Cupcakes from Sprinkles? (Use them to stack and build a cake?) For a child, some of the CS places have birthday/special cakes at the dessert counters. I think Plaza Inn and RDZ had these cakes? And, of course, there are the custom cakes that can be ordered and then delivered to most TS locations. My philosophy is that if you have a particular favorite dessert at DLR, that can be your birthday dessert -- get more than one if you'd like -- hey, it's your birthday!