I myself play viola, flute, piano, saxophone, piccolo, violin, cello and the sitar. Recently I attended an All-City concert and our total amount of orchestra players alone under age 18 was 728 which peaked my interest in how many people on this website play an instrument.
I was a sax player from 3rd Grade - college; originally on Alto, but in the end, mostly Bari sax. I've also taught myself piano, drums, a bit of bass guitar and a tiny bit of regular guitar - though stringed instruments and I don't seem to get along as well. I also played the occasional clarinet, bass clarinet, and flute in college (as is generally expected from sax players at that level), but I wasn't particularly good at them.
Still, I had a ton of fun playing in the various bands in school and occasionally afterwards. It's been a while, though...
I play the guitar, piano, keyboard, penny whistle, tuba, trumbone and learning the bagpipe, if i could id play the harp and electric vmomentand hapanese flute and steel drums and a few others i can't think of the names at the moment