My introduction to Dungeons and Dragons happened in 1976 or thereabouts.
My older brother was in middle school, and had fallen in with some wargamer types. Through those middle-school wargamers, he ended up joining several wargaming clubs, one being at the nearby University, and the other at a college across town.
One day, he brought a little white box home from the college war-gaming club, containing several small brown booklets.
Being nine at the time, and curious as all get-on, I got hold of, and read those books. Between the fantastic artwork (crude thought it was) and the idea of playing bold adventurers slaying monsters, I was hooked.