An Illinois school district is using Global Positioning System tags to track children when they get on and off some of the district's school buses.

Palos Heights School District has attached the devices to student's backpacks. The electronic reader card registers date, time and location of kids and buses with school officials.

The school's superintendent says the tracking system can locate kids in seconds. It's supposed to give parents peace of mind.

"A little piece of mind helps you get through the day," said Ann O'Brien, a mother of four children in Palos Heights School District 128 told Chicago television station WMAQ. "They can locate kid and bus in seconds."

The GPS tracking system cost the district $16,000, and a lot of parents think the money was well spent. So far, 10 of the district's school buses are covered using the system.