We're planning a trip to Disney World to celebrate my daughters birthday. We have one on 8/31 and two on 9/3 (twins). Are the buttons dated? Can I pick them up on the same day? Do I have to bring their birth certificates as proof. What experiences have your children had when wearing the pin? Should I do anything else special? I'm going to order a cake at Chef Mickey's. Thanks. Any input would be greatly appreciated.