We use the silicone bracelets from Shanrene as well as there's no way a panicked young child will remember a cell phone number. Any ID you use has to be easily visible to a CM as they won't look inside a child's clothing.
Also, take a picture of them in the morning so you can remember what they're wearing that particular day.
And most importantly, AS SOON AS you realize your child is missing, TELL A CAST MEMBER. That way they can get on the radio and put out an alert while you're frantically searching. The more eyes you have looking, the better. Don't think you're inconveniencing them or over-reacting. They LOVE to help!
Just this past week we lost our youngest (2 years old) in the World of
Disney store at Downtown Disney when he hopped out of the stroller to go see something while DH's back was turned. DH was calling him and searching through all the racks while I took the other 2 boys and told a cashier that we were missing a child. She waved over a security guard (who all have radios) who smiled, flicked on her radio, and put out an alert that there was a little boy missing in World of Disney and gave out his description, what he was wearing, and his name.
The security guard was very sweet and told me this happens quite frequently and did her best to keep me somewhat calm with small talk and occasional radio updates. While it seemed like an eternity, it was probably only 3-4 minutes later that she got a response that a CM on the other side of the store had him. DH hustled over to get him and the silly kid didn't even realize he had been "lost" as he handed DH a toy he had grabbed and said with a smile "I want this!".
It would have taken us ages to find him on our own as it is tough to track down a moving target in a crowded place with lots of twists and turns. So put ID on your child and then ask for help as soon as you think you need it.
