As a kid, I loved looking through the glass walls of our clock. I remember mounting the cement shelves to peep into the mechanical organs, the intricate motions endlessly fascinating me. But what really stole the show was the hourly chimes. All of a sudden, seemingly passive parts would spring into life, wheels would being to rotate at varying speeds, their collective vigor finally transferring into an arrow-shaped blade that would furiously rotate into near-invisibility and cranking up a tiny hammer that would strike as many times as the hour. Half-hourly chimes were no less fun.