An inventor has developed a possible solution to the recurring problem of kids left in hot cars—and she did so before even graduating from high school. Alissa Chavez, 17, came up with the basic idea for her lifesaving contraption for a school science fair, the Washington Post reports.
(Yes, she won.) It involves an alarm system warning parents when a child has been left in a car seat, no matter what the temperature. The "Hot Seat," in its latest incarnation, uses a pressure sensor and your car keys.
The system monitors a tracker on your keychain, detecting when you're more than 40 feet away from the car. At that point, it checks the pressure sensor to determine whether there's a child still in the car seat—and if there is, alarms sound.
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