When I was about 14yrs old I was playing around with MIDI on the PC, I didn't have a piano keyboard, long before MP3s were around. I wrote the three little tunes. I recently came across them and thought I'd share. :)
Keep in mind, this was the humble attempt of a 14yr-old way back in the day when MODs ruled the earth and Win3.1 was just released. I didn't have a keyboard, these are manually entered notes, so there aren't any dynamics. My sound card was an early Sound Blaster AWE32, so the MIDI to WAV port (now WAV to MP3) isn't the greatest, but hey, it's cute.
P.S. I'm now getting into multi-track recoding using my digital piano, guitars (acoustic, classical, and electric), and my wife's voice & violin playing. :)