This would be easy to do using a paper plate and construction paper to make in the classroom. Snowman COUNTDOWN to Christmas Wall Hanging / ADVENT Calendar
DIY Christmas Cards from MollyMoo would make cute holiday decorations, and they would also be fun for creating a holiday character to write about.
cute Christmas card - star (or snowflake) & letter stamps (christmas art cards)
40 Creative Handprint and Footprint Crafts for Christmas -> Handprint Reindeers and Footprint Sleigh Christmas Craft - Crafting By Holiday