GPS Tracking your child

I have always wondered how we could use GPS receiver embedded into the clothing of our Autistic son, so that should he stray, we could track him down. We clutch him tightly in crowded places and don't lift our eyes from him. We have also wanted to put some id or contact details on him so that some person finding him can direct our non verbal autistic son back to us .. Just in case >>

The Good news. I read someone has come up with a suitable device. The Bad news, its available currently on in the US and Canada; and even by their standards, its fairly expensive.

The device is called Amber Alert GPS , requires an initial payment for the device, and then a monthly subscription. Still a very handy device. Small and could be put into a convenient place of clothing or a carry on bag etc.
Details are available on their website.
https://www.amberalertgps.com/

Kindle and Autism

Since our kids are more visual communicators, a touch screen device may make a handy communication device. I wanted to see If this new sensation that is expected to replace books ( I have my doubts though ..) could help our kids communicate. So Googling around I found this nice site where there was a  discussion on its utility.
http://www.wired.com/geekdad/2009/01/whats-the-best/comment-page-1/#comments . Its a discussion that started on a simple and apt question,

What’s the Best Computer for an Autistic Child?  

Though they felt Kindle was not the solution, I do believe that it was targeted at a specific use of the device by the child's mom. They have not looked at it as a communication device. For instance have a schedule board, a communication board, a choice board .. all onto the Kindle. Will that help? I am sure that might, esp since you can carry it around. I don't know the exact functionality of the device and so will comment more on it as I read about it.  So use it more like an output device and not as an Input device.