So on the way to school I asked if he wanted to go see Snowball with Krista. He said yes and got excited, he then said, "we get to roll it too" so I asked if he got to roll the cat before. He said "Noooo, Snowball".

You probably get where this is going, the cat is not named Snowball (Dad's bad memory) but is named Sammy. Thus Nick thought he was going to see snow and that is why you can roll it, to make the snowball. This kid is going to be trouble, already smarter then me!