Perhaps the kids might like to make these easy SNOWFLAKE and SNOWMAN Doorknob Hangers.
The free templates can be found on my website. Just click on the link below, then go to Worksheets PreK - Gr.2.
Younger students may need help cutting out the doorknob hangers or they could be pre-cut for the students to color and decorate.
Perhaps the kids might also like to read some good books with a snow theme. Here are a few from Amazon.