I'm 23, so not the oldest in the room, but learned at a pretty young age.
I was 8 and it was 2nd grade. Our school had a whole Mac computer lab. It seems pretty impressive looking back because our elementary school in general wasn't very nice or special at the time. It was just a plain public school.
I think we first started around goofing with how to make word files on our own floppy discs. I do remember some typing game though that we played weekly for an extensive period of time. It had like aliens attacking and you countered by using various parts of the keyboard in typing exercises.
Around that same time, we had got two Win95 computers in our house. My stepdad had one in his personal office and then we had a family one. We mostly used it for some awful games (some golf one I vaguely remember), but then there was like AOL 2.0/3.0 and so on. Been connected to computers ever since.