ANH (4K77 and Revisited), ESB (Despecialized and Revisited), Clone Wars series, ROTS (Hal9000’s latest version), ROTJ (4K83 and DarthRush’s fanedit - I like his cutlist), TFA (Starlight Project, when it comes out finalized), TLJ (Rekindled, latest version), and ROS (whatever fanedit I like most).
Only show them TMP and AOTC with the Rifftrax, or through the excellent Lego Star Wars videogames. Blackened Mantle is also appropriate, if your kid likes reading subtitles.