I was thinking the same thing, almost all the jokes are aimed at adults, or have something to do with weed [again, aimed at adults] - i wouldnt expect a kid to know any of them, but they still laugh. But damn, if a little kid and a grown man can watch it and laugh togeter it can ONLY be great.

It's not untill recently that i realised, almost EVERY episode has 1 or more sly referances to weed, and sometimes they're really obvious [for example, the homer smokes weed one LOL]