I came to the computer world fairly late. My first computer was an IBM 386 running Windows 3.1.
(Actually, I had an old one sitting at home when I was a kid. Nobody knew how to do anything with it, though. I just remember having to write like seven pages of BASIC just to play Hangman, or whatever it was. I don't think it counts, though, since the most we ever used if for was to pile folded clothes on in the Laundry Room.)
Edit: I remember getting a computer lab at our school when I was in Grade 7. It had one Apple IIe and the rest were PCs. We didn't really have any classes set up to use the lab, and then they started just adding optional classes... I remember me and a buddy stole some of the mouses from the lab and sold them at a pawn shop downtown, then bought some Portuguese wine from someone else at the school whose parents made it in their garage.