Are you leaving out Enterprise? That one is tricky as hell, because it dips into the new show territories a few times.
TOS > all the old Trek movies before Generations > TNG > Generations (after season 4 TNG I think) > DS9 > First Contact after Season 3 DS9 (Pretty sure that is when Defiant and Worf show up) > Voyager pilot before the full on Dominion War I think? But it is far removed so it doesn't really matter much because most of it is post DS9 in the scheme of things. Have your kids skip that dumb hippy young planet one, that one sucked ;p In fact, pretend the last 2 TNG movies didn't exist.