Got Idiot Sensors?

Your car has a sensor that tells you when you've left the headlights on or the keys in the ignition. It probably has another reminding you and your passengers to buckle your seat belts, and still another that sounds when the door is ajar. Some cars even to tell you when the tires need inflating.

But so far, there's no standard equipment to tell you that you've left a child in the back seat of a hot car.

"How many people died because their keys were left in the ignition, headlights left on?" asks Janette Fennell, who tracks hot-car deaths as president and founder of Kids and Cars. "They have the opportunity to eradicate this as a cause of injury and death to children for a relatively low cost. Why not do it?"