It's actually to keep in touch with children who are 12 and 10. I haven't even decided that they are allowed to wonder without me, but they are asking, and I was concerned about keeping in touch with them and being able to find out where they are. I saw someone before mention walkie talkies and thought it might be a good idea. I will have to think about it some more.
So my next question is, how safe is it to let children go and do things by themselves?