Well, you’ve made it this far so kudos to you!
I’d say get yourself some of the better fan restorations/preservations and show him the original cuts. I showed my kids (ages 5 and 3) the original cuts of the original trilogy in this way earlier this year and it was a great experience all around.
I’d personally go for 4K77 for Star Wars, harmy’s despecialized 2.0 for The Empire Strikes Back, and 4K83 for Return of the Jedi. I’m sorry I’m not much help in regards to obtaining these versions but I’m sure some of the helpful people on this board will jump in and help point you in the right direction.