Art of baseball: Keeping score
I can't tell you how many hours I whiled away during my childhood, listening to a Twins game on the radio while keeping score and trying to visualize the action. I couldn't do it now to save my life, but it's one of those things that brought the game alive for me. Every now and then while I'm at an Astros game, I'll see someone keeping score, and I feel 12 years old again- it really has becoming a lost art.