It took two grandfathers to figure out that if satellite tracking can find missing cars, it can be used to locate missing children. Dan Booker and Bill Brown have invented SatCel, a device that emits signals to a central tracking center. It's the size of a cell phone and can be be hidden in a child's backpack, but the inventors say a much smaller version is in the works. They plan to make the device available to families for free. However, customers will be charged about $108 a year for service. For information call: 800-557-2842.
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