My dad played every other Saturday with his group at our house. I remember reading through the 1E Monster Manual and Fiend Folio for maybe a year or so before he began teaching me and my sister when I was in junior high, maybe 11-12 years old, maybe around 1992 or so. My sister is 2 years younger than I, so she was about 9-10. Then I was in college when 3e came out, and they had big promotional tents and stuff, so I got in on the ground floor of 3e my sophomore year in college. I've been gaming for... holy smokes, 16 or so years by now.