I understand why this question is asked so frequently, but I also think the best answer is to just let them discover it on their own, however it is they discover it - whether that’s hearing about it from a friend, picking it out of a home video library on their own, or stumbling across it on TV (or netflix, or youtube now, I guess? Twitch tv maybe?) I don’t think I missed out or lost anything by not having my dad set me down to watch Star Wars with him after having figured out the optimal viewing order. I became a fan of the original trilogy by myself, and that sense of discovery is a big part of why it stuck with me all this time. There’s a big difference between finding this very cool thing “on your own” vs. having it carefully curated and presented to you like a rite of passage. Kids can and do recognize this, even if they don’t have the words for those concepts yet.