Smartphone devices equipped with GPS tracking technology can help parents keep track of their trick-or-treaters.
The Google Latitude App allows parents to invite their children to share their location on their cell phone.
Be mindful that it shares the parent's location, too.
The Lookout App, traditionally used to locate a lost or stolen device, can be downloaded on a child's cell phone.
Parents can see their child's location by logging online and clicking "missing device."
Both of those apps are free and available on Android, Blackberry, Apple, and other devices.
Some paid apps include parental controls to keep children from tampering with them.