Quite so, quite so. My dad was 22 when Star Wars came out and he went to see it three times in less than a week. The youngest of my aunts was 12 at the time and became utterly obsessed with it. She was the one who later got me into it, when I was 7. It really is a film for all ages.
Now 7 may have been a bit young for Empire, because I was utterly freaked out and dismayed by it, but I suppose I was probably a bit oversensitive back then, and at any rate it had such gravitas and depth that it really stayed with me regardless. Jedi is a bit more of a kid's movie than the other two, but still has enough weight to be worthwhile. But the prequels, by contrast, are easy to grow out of once you're able to see past the shiny surface to the nothing underneath (and get bugged by the contradictions).