I started with saxophone when I was in fifth grade because my sister played it. I learned it on my own but only played at it for a few months before moving on to drums.
I played drums for two years until the band director asked me to switch to trombone in 8th grade (they needed trombones, and my trimming ability had peaked (never could get the proper rebound in the left hand stick).
I played trombone through college. I played in marching band, pep band, jazz band, dance band, and in the Wheeling (West Virginia) symphony training orchestra.
In college, I started as a trombonist in the Wheaton College Symphony orchestra and was doing very well, but I decided I preferred singing in the Men's Glee Club (we went on tour in Europe and the group had a very good reputation internationally.) I continued with trombone, however, in my ROTC (Reserve Officer Training Corps) assignment in the military band. In the summers, I played trombone in a dance band "back home" where we performed at wedding receptions, etc.
In high school, I taught myself how to play guitar. I had a classical guitar (nylon strings instead of steel strings, 12 frets in the neck instead of 14, but I played mostly folk music (It was the 60s, after all.) I learned from other guitarists how to do what is called "finger-picking," and I got proficient enough to perform at local coffee houses. At one performance, I met a young woman who had performed "Lyndon Johnson Told the Nation" (by Tom Paxton) on the Ed Sullivan Show. She was impressed with my rendition of the song "The First Time (Ever I Saw Your Face)"--long before Roberta Flack recorded it for a hit, and we traded lyrics and chords for the two songs. I still have the paper on which she wrote the lyrics and chords for me, but for the life of me, I can't remember her name.
As a teacher, I took my guitar in every year for the first 20 years of my career when I taught the unit on Ballads for my senior college Prep English classes. I did it to copy what my own senior English teacher had done when *I* was in high school, and it was well-received by my students. By the 20th year, though, my playing deteriorated, and I made the correct decision to create a Power Point "Ballads" program that incorporated various ballads from a variety of artists, including a ballad or two from recordings of my time with the Wheaton College Glee Club. These lessons were a great success, and I should have started them after 15 years instead of waiting til 20.
The only other musical instrument I play is ... the radio. :-)