Do you know where your child is? You do if he or she
wears one of Wherify Wireless's GPS locator watches. A Web site lets
you pinpoint your kid's location to within a few feet. A circle
representing your child is displayed on a street map or an aerial
photo, and the "breadcrumb" feature can trace movements over time
(Big Brother, meet Big Mother). In an emergency, the wearer can
place a 911 call by pressing two buttons. $200 plus the
$20-$45/month service fee.