I never have left small children in a car and never would. I remember my mother saving three young children whose mother had left them to briefly go into a store. We parked beside their car and my mother was going into the store when their car began to roll backward (it was on an incline) towards a 5 lane road which was thick with fast moving cars. Honestly, I still cannot believe my mother moved that fast at her age, but she somehow RAN and got into that car and managed to stop it rolling just before it would have entered traffic. She thought perhaps the emergency brake was not on or even malfunctioned. She was too rattled to check out all the details. If my mother hadn't managed to stop that car, the children would have doubtless been injured, possibly even killed. She made me promise, then and there, to never leave kids alone in a car while I ran into a store.