These are the cutest snowmen! I found them over at Exploring Art (Abby Schukei) and the kids are loving them. It has been a really fun way to learn about creating form by using value.
Here is mine (which I did in paint but then decided that I liked the idea of using oil pastels better.)
This is an accessories-free snowman so they can really focus on just the shading and form.
Some student examples!
tinyartroom 
I love your take on this project! Did you students just love doing it? They are always such a hit with my students and they really seem to grasp the concept of value and shading.
Abby, they loved it! And you’re right, they definitely learned more about creating form. Thanks for aharing your awesome project!
As a newly retired elem. teacher, I learn so much from you…. while also taking art lessons. Thanks sooooo much for sharing your ideas online. Your projects help m e grown and learn immensely.
Thanks, Sandy! You’re too sweet. “It’s never too late to be what you might have been.” Enjoy retirement!!