If the kids are really thirsty, I will get them a little juice to have on the way around, but I will always keep the bottle and pay at the end. Most of the time though I make them wait until we are in the car until they can have it.

I think you are right for doing what you did because it will only cause more issues down the track if you let him have it sometimes and make him wait others. He is little enough that he won't understand IYKWIM?

And bah to the checkout chick, she isn't the one trying to instill good manners and patience in a toddler.

PS; Paige is the worst for pinching grapes!