Then why do they call him Frosty the Snowman?!

This morning, the boys had a two-hour fog delay. Drew looked out the window at the frosted grass and said, "Oh! It's snowing today." I told him that it was frosty, not snowy. He said, "No, it snowed." I said, "Close, but that is just frost." to which he replied, "Yeah, right." Little booger didn't believe me. He knows what it means when the ground is white!