So the Merrian-Webster definition of a "saga" is a long and complicated series of events. Or in cinema speak, many, many sequals. But not just any sequels. I've always said, that the best way to ruin a GREAT movie (the singular) is to make a sequel.
Star Wars is, of course, not just a "movie." It's a Saga, a piece of a bigger puzzle. Just like Lord of the Rings. The important thing to remember is each of these episodes not only stand apart as their own story, but continue a larger story which is impacted by previous events. As you could imagine, this is a bit difficult to explain to a 7 year old. And so the conversation continues.
Me: Alexander, do you know the difference between a movie that has a sequel and a saga?
Me: Well, most movies are made just as a one-time movie. Like 'The Incredibles' or 'Big Hero Six.' There's a story to tell, and once it's over that's it.
Me: Then there are other movies that have a sequel, but are not a saga. Such as 'the Santa Clause' or 'Shrek' or 'Despicable Me'. These are just movies attempting to monetarily capitalize on the unexpected success of the first one.
Me: And then there's a Saga. Lord of the Rings, which you're too young to see. Back to the Future. And of course, Star Wars. These movies are sagas. Do you know why they are sagas?
Alexander: ... because they're ... wet?
Of course at this point i bust out laughing. SAGA. He mixed it up with SOGGY!
I literally almost peed my pants.
I'll circle back around to this topic when you're 10, buddy.