I am sure it has been mentioned here, but a girl in front of us in line had an address label on the back of her, it said 'I belong to..." with her parents cell phone #s on it. It looked like they stuck it on her with out her even knowing! I like it better then the Who's Shoes. I am going to do it next year. Thought I would pass it along...
My kids are older, so I give them a business type card that has thier name, our names, our cell #, and resort on it. I have them put it in thier fanny pack.