I completely get what you mean Dominic,

At least for me, it’s not so much of “kids dissing at Luke” with laughter is the exact thought on this topic. I think its more of … how it could come across of the “audience” watching the children laugh as Luke “faces the FO and then disappears.” one could IMPLY they are “laughing at the cowardly Luke” or “He got blown up, funny loser”

So to help streamline things, since we have laughing children … why not make the portrayal of the scene imply some comedy. Having “puppet luke” essentially hit them with, or knock them back with “The FireBall of Destiny” would probably make a child laugh when you see the big ole walker puppet fall down from it.

Kids … and adults … laugh at people/animals/things hurting themselves or falling down.

It’s a simpler way to convey it, and this is a story based on “what they’ve heard.” So the exact events do not need to follow exactly what happened in TLJ … Only Luke and FO saw what happened. Events and stories get distorted … but the idea of the “legend of Skywalker” who created the spark for the galaxy to start raising up is key.

Also, for dialogue sake, if it helps, maybe even a simple line of “The Jedi” could help if it is easier to implement than “Luke Skywalker.” Dunno if that helps with anything, but maybe for the alien dialogue? Jabba the Hutt did use, in “english”, “Jedi” and “Jedi Mind trick.” It may … feel more natural?