I always make my kids a small ID about the size of a business card. I use Microsoft word to create it. I use a small photo that I scanned in and add their name, age, date of birth, hair color, eyes, etc. After I print it, I "laminate" it by putting clear packing tape on each side. They carry one and I carry one (in case they get lost, I can just hand the ID to security and not have to try to talk while I panic)
I've had alot of comments from airport personnel that it's a great idea.
Especially when they were younger and didn't talk well, I would worry that they would get lost in an airport and no one would have a clue where to start on finding out who they were. How would security know where they were from?
Chris