A Calculus Christmas

So, I was sick on Christmas and had to spend a majority of the day by myself so that I wouldn't contaminate my family.  That gave me a lot of time to think and surf the Internet.  And since I was feeling in the Christmas spirit, I started poking around Google for Christmas-Themed Calculus Activities.  Well, apparently I'm not the first person to do this.  You can look for hours without end at horribly done Calculus-Themed Christmas carols on YouTube.  I've posted one of the better one's here for your enjoyment.  Merry Christmas!  =D