Prizes at the Grocery Store

I was at the Superstore buying food this morning. There was lady with a little boy, and her cart was taking up more of the aisle. An old man was coming the other way, hoping to get past her with his cart, so I smiled at him and waited. Once he was passed her, and as I started off to squeeze through the hole myself, he said to me, "thanks, you get three gold stars!". I was cute, it was something only a friendly old man could pull off and not sounds like a lunatic. So I said back, "sweet, thanks, do I get to trade them at the checkout for prizes of something?", to which he laughed, and off I went. As I was about the leave the aisle, I overheard the little boy say with an in take or breath, "Mommy, there's prizes!"