Our DD turned 13 during our last trip to Disney. We stopped at Guest Relations in the MK to pick up a birthday button. All day long she was wished Happy Birthday by the CM's... in the restaurants, the rides, the shops. Here's a couple of extra special things that happened. We ate breakfast in the castle and she was given a birthday cupcake and presented a magical moment certificate that all the princesses had signed, and all of the princesses posed for a picture with her. I didn't think she would appreciate the whole princess thing at that "Oh I'm so cool age", but she really did enjoy the attention. Also, we rode Splash Mountain and were in the shop to purchase our ride pictures when the CM noticed her birthday button. The CM gave us our ride pictures free in honor of her birthday.