I use 'prudent avoidance' when it comes to wireless stuff. And whilst I do use a mobile, I don't let my kids use it. FIL knows this (and thinks it's paranoid). Today I caught him letting her speak to MIL on it. I was really annoyed, but let it go as it was only a quick call. Was wondering what others thought about mobile phone use for under 5's? IS once in a blue moon OK? How long how often? FILS argument was that just a few minutes wont hurt, but it really bothered me!