I wondered the same thing as Mainbound, but still liked the wristbands. Most of the time we just put it on, not loosely, but definitely not too tight, around the ankle over my children's socks. They never complained about the comfort.
I explained what it was to two of my kids (ages 2 and 4) and that if they were lost they should show the bracelet to an adult. As for the 10 month old, I just hoped it would help if necessary. I would assume Disney Cast Members are super-trained in helping reunite lost children with their parents, and are made aware of the common methods of child ID's - especially ones available commercially.
The same for the tag on the shoe.... My DD wore this when she was 18 months old. I hope if she did get lost Cast Members would know to look for a form of ID.
No matter what you use, there are pitfalls, and as a parent it scares the heebie jeebies out of me to think about losing my child, no matter what kind of ID she has!!!
Depending on the ages of the children, more importantly than ID is teaching them basic safety -
What to do if lost --
Stay in one spot, where you last saw your mom or dad
Who the safe adults are and how to find one --
- In Disney point out the Cast Member name tags with WHITE backgrounds
- In a store, a person behind a counter or cash resgister
- The Center for Missing and Exploited Children recommends asking for help from: a mom with children; a pregnant woman; someone who reminds the child of grandma; someone behind a cash register/counter
Good luck in what you choose. And may you never need to put an ID to use!
Hope that helps,