As someone who works retail (front-end cashier more specifically), little kids can make or break a day. Nothing like the mother of four who let her kids tear open a bag of Oreos, forgot about it being open, and dumped it all over the belt while you're trying to keep them from stealing the damn candy.
I sympathize with how much effort it must take to raise such "active" children, but please, parents, begin teaching them how to behave in public before surrounding them with packaged food.
They can really break the monotony of a day, though, if they're just being cute with "mommy" or "daddy." It's just that those kids only seem to come along once a week while the other are multiple times a day.