You may remember Instructables user mezcraft from her amazing Harry Potter-themed gingerbread house. Believe it or not, she's actually topped that achievement. Mezcraft's cuckoo clock isn't just gingerbread on the outside. The gears are gingerbread, too! Mind you, it doesn't actually function as a clock. But gingerbread engineering has advanced so rapidly in the past few years that surely such a clock will be available in the near future.
Link -via Craft