Recently, King, Number 1, and I went to Orlando for a regional Irish dance competition. After a long day of travel, we went to eat dinner in the hotel's restaurant. When we returned to our room, the housekeeping staff had gone in, turned down the bed, left chocolates on our pillows, and turned on the grooviest feature of the alarm clock: crickets chirping. I thought it was cool so I left it on. As it turns out, it is the most relaxing sound in the world to sleep to. I don't know if it taps into a prehistoric disposition to sleeping outdoors or just what. But, I'll tell ya, it's better than popping a Tylenol PM! (Not that I do that, mind you. Not very often anyway.)
Even better is that when we get home, I checked and King has that same exact feature on his alarm clock. We've been sleepin' like cavemen, baby!