Here is the Pikavu Express Locator, a GPS tracking product from Spain that basically allows you to track the location of your child. The solution includes a GPS wristwatch and a portable receiver.
The GPS watch is to be worn by your kid. It is waterproof and impact resistant and comes with safety lock, so the child can’t remove it, nor other people. The portable receiver gets a 4.2-inch touchscreen display to show you the location of your kid. The Pikavu system uses 4 positioning systems (SBAS-GPS, indoorVision, VisionCellid and T-GSM) to locate the position of the child in just 10 seconds.
The Pikavu Express Locator costs Euro 950.