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.

wherify.com/