A video from http://www.donpower.me that shows how to draw a simple Christmas tree.
This video is basically for kids. The presenter in this video, shows how using simple crayons a Christmas tree can be drawn in not time. The short duration of this video (0:59 seconds) is proof enough.
The basic idea is to draw a tree using a few scribbles of an appropriate crayon. A simple star can also be added to the top of the tree. Then a few small dots of different to denote all the decorations that are done on the tree during Christmas.