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!
Found it at Blitsy - DIY Altered Tim Holtz Christmas Clock
I wonder what the "cuckoo" sounds like