This is another great project I found on Pinterest. I just changed it a bit. It's from http://createartwithme.com/snowman-painting-markers/snowmanpainting/.
I first showed the students real snowflakes and snowflakes by artists. There are some great videos on the formation of snowflakes on YouTube.
We also discussed parts of a painting (foreground, middleground and background) and how things in the foreground are usually bigger than the things in the background.
I provided patterns for the body of the snowmen and students traced them in the foreground.
Students added details and the land. Make sure to tell students not to add a hat so snowflakes can be added. Trace everything with a sharpie.
The next step was to draw snowflakes and the wind. I showed them the painting of "Starry Night" and we discussed the wind. Students drew snowflakes and the wind with a pencil and then traced them with a white crayon.
This was day One.
On day two students painted the sky with cool colors and added watery blue to the sides of the snowman and the land.