We used pencil to first draw our snakes and background. I then showed them a lesson on how to blend and properly use chalk pastels. We had alot of students who were using it for the first time, so they quickly learned how fast they can smudge and make a big mess on your paper.
They got to work creating their snakes and having them weave behind and in front of the tree. that part was a little tricky, but they all got through it and the final results were very impressive. Here are some of the snakes:
This one is my sample