I am still working backwards through the first challenges at CSAYL.
Here is the sketch for #9:
Here's my take on it. I apologize for the poor picture quality - the color looks funny:
I cheated a little on this one. Everything is cut out of patterned paper. I love the reindeer in the background snowboarding, making snowmen, sledding, etc. The sentiment "reindeer games" also is cut out of patterned paper.