Okay, so maybe I am obsessed with GPS tracking of children - but I just came across a pretty cool device that can give parents peace of mind and is not as extreme as implanting a chip under your child's skin.
At the 2009 Consumer Electronics Show (CES) in Las Vegas, British company Lok8u introduced the Num8 digital wristwatch. It looks like a typical watch but what lies beneath is a GPS chip that constantly keeps tabs on the location of the child and can be monitored on the company's website. The device is accurate to within 10 feet and if the watch is forcibly removed it sends an alert to the parents via e-mail and cell phone.
The Num8 is approximately $200 to purchase and $8 for monthly service. Click here to see a clip with more information about the Num8 and how it can be used to protect your child.