I have a three year old and a 5 year old. I have heard that even going in the gas station to pay for the gas is illegal. I was always very careful, never leave the babies in the car, only get gas when I can pay at the pump, drag the child and the baby/carseat in with me when I run in somewhere to pay a bill etc. But as theyve aged, I realized that I live in a town of about 1,500 people and no one is going to "report" me if I run in the gas station to pay and leave them in the car for 1 1/2 minutes. But I seem to have gotten in the habit of taking them with me no matter how quick a trip it is, so a ten second-run-in-and-drop-it-off has always been an ordeal hhahahaha. I don't think its a big deal, but I don't do it very often. Maybe 3 times in my 5 years of motherhood.