Every year about a dozen children die in Brazil in the summer because their parents/caretakers forget them inside their cars, usually when going to work. This happens when the pressures of modern life coupled with some change in routine make them forget to drop their children in daycare before going to work, so they stay sleeping in the back seat.
My proposed project uses a sensor in the baby chair and another in the car to remember the driver that the child is still in the baby chair when they turn the engine off. This is done in different ways, including a Bluetooth link to their cell phone (because some drive while using earphones and other alarm methods become ineffective).
This project is of concern to thousands of parents in Brazil alone and there´s a big market also in other countries with extreme climates (hot or cold).
If this entry is offensive or violates the contest requirements, or you suspect the entrant is cheating.