Looks like she started with a basic granny square (the colored parts) and simply expanded the stocking by continuing the pattern. My mom taught me to crochet when I was 9, and this was the pattern she taught me. I am by no means an expert, but I'd say the granny square is one of the easiest things to make. A beginning crochet class at your local Joann's or yarn shop should give you a good start. If a 9 year old can do it, so can you!