I think this DIY Christmas Advent Calendar Clock is terrific. I always loved advent calendars when I was growing up. Sponsored by Dunkin' Donuts.
I have this Nightmare Before Christmas cuckoo clock. Comes with an authenticity Certificate that is numbered which I didn't know before getting it. It's So beautifully crafted it's breathtaking!
DIY Wooden Christmas Clock Advent Calendar - great alternative to the box or felt calendar!
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
Found it at Blitsy - DIY Altered Tim Holtz Christmas Clock
I wonder what the "cuckoo" sounds like