The earliest PC game I can coherently remember playing is King's Quest IV, when I was five. It was due to this game that I learned how to read (as well as spell) rather simple words and verb/direct object relationships-- "get carrot" "lead goat" "climb tree" "lower bucket" "swim down" "get gold".
Long before that, however, I played with our Tandy TRS CoCo (Color Computer) II. I vaugely remember cartridge games like Panic Button, Fraction Fever, Shooting Gallery, Super Pitfall (I actually have quite vivid memories of this one and the next), and Temple of Rom. I got my first programming experience with the CoCoII at the age of seven, writing a nice program to ask a name, birthday, and current date, then display some sort of first-grade humorish message about how long it was until the user's birthday in big letters. We used the computer until it's poor processor finally ceased to work-- in 1994, at the ripe old age of 11.
And then, of course, there is the Tandy 1000EX. I recently dragged it out of the garage, cleaned it up, got it working, and rechristened it Audrey. She's still working just fine today, running anything from DOS 2.11 to 3.1, depending on the program. Big Blue Disks, pirated long ago, are again finding use. Old interactive fiction, like the Zork trilogy, The Hitchhiker's Guide to the Galaxy, Planetfall, and Stationfall are played quite regularly to keep her in shape.
I (slightly more recently) found a bit of my childhood saved on an old floppy of Deskmate. My dad had left my mom, my little sister, and I a message on the Notepad:
"Hi Linda!
Hi Amy!
Hi Rachel!"
I also found a few .bmp's my sister and I created. They aren't much but
scribblings of colors and patterns, with the occaisonal heart and sun rising out
of the mess. Perhaps one day I'll upload them here, if I can get them converted.