First personal radio: A crystal set, built from scratch. One lead attached to the bedsprings, the other to the radiator. I listened to WTOP and (I think it was) WPGC at night. Had a single earphone I stuck in my ear.
First favorite song: "Take Five" by the Dave Brubeck quartet
First musical instrument: A fake one - a piece of plywood cut out to look like an electric guitar. Some buddies of mine all had them, and we'd lip-synch to the Beatles and the Rolling Stones.
First REAL musical instrument: A harmonica. Learned to play blues, bought more, joined a band, played gigs, had a great time. Then the time came to make some money, so I had to quit the band (couldn't show up for practice), and so I avoided fame and fortune, successfully winning my spot in the real world.