The best way to introduce someone who’s never seen Star Wars, is introduce these people through OOT, in whatever format that can be found (Harmy, GOUT, VHS, etc), and neglect to mention anything other Star Wars media. Should children discover the prequels, sequels, and shitquels on their own, you must be prepared. They’ll ask about them. The initial response must be to tell them those movies are boring, try to make them as unnatractive as possible. If they still ask to see them, show it to them, but try to achieve rejection, without explictitly forbiding them boys to watch those movies. Mind you, avoid traumatizing them, as that’d be bad parenthood.
A good strategy, for instance, picture the text about “Trade Taxations of the Trade Routes” appearing, use this oportunity to explain the children in detail what taxation is and talk them about the economy. Every time Qui-gon says something stupid, you can make a quip like “children, don’t be like this man”.
If that doesn’t work, try unleashing a disgusting hodor around the house, so they’ll relate the experience of watching those films to such unpleasantness. Serving a foul meal when they watch the film can also work.