Jacob (the 3-year-old) reached a very important developmental milestone recently: He started paying at least a small bit of attention to the songs playing on our car stereo system. I was happy at first, because I am more than ready to share my impeccable musical taste with my offspring. However, I was also a bit sad (isn’t that always how it is?) because it marked the end of the obliviousness era. Alas, my favorite 2 Live Crew CD and Tupac’s incomparable “Hit ‘Em Up” single must now be consigned to my handy Discman that I use when I’m working out. The kids are officially paying attention and impressionable.