I first wrote about Denver puzzlemaker Kagen Schaefer’s gorgeous purpleheart butcherblock benchtop two years ago, and now Kagen’s knocked me out again with this nigh-unbelievable desk. It features eight working wooden organ pipes that play notes when when you push in the various drawers, and a pneumatic computer that can recognize a particular melody and open a secret compartment in response. On top of that, the pneumatic lock can be reprogrammed to recognize other melodies, and the whole enchilada is made entirely of wood. Holy smokes. [via adafruit]