An interesting question. Mostly piano, though only 2 years of lessons, so I'm not especially good. I wanted to play the piano ever since my mother played the 1st movement of Moonlight Sonata for me (she couldn't read music at all when she was younger, but had laboriously counted out each note, and gradually committed the entire piece to memory!)
My first instrument was trumpet, and I've taught myself to play flute a little (and to a lesser degree clarinet and sax).
One of the best classes I ever had was in music theory, in junior high school, from a woman who really had a skill for teaching it. Being able read and understand the relationships between musical notes, as well as distinguishing musical notes as they're played, is a very useful thing to know!
When I get some time, I'll post some more "strings" for the above obfuscation. The default tune is variation #7 of the twelve variations on the theme of "Ah, vous dirai-je, Maman" by Mozart, more commonly known nowadays as "Twinkle, Twinkle Little Star".