What's a snowball?

A funny thing about living in Florida ~ those kids who have grown up here have never seen snow. During the main lesson for the kids at church this last Sunday, the director was talking about the snowball effect and then had to ask, "How many of you have seen snow?". Most of the kids hadn't. So she had to explain what happens when a snowball rolls and how it gathers snow. I thought this was hilarious, so I wanted to share it will all you Northern folks.