I also think the original Star Wars Trilogy instilled such a strong sense of these concepts for kids:

-Good and evil

-Evil being easier but not more powerful.

-Temptation (the emperor is basically the devil)

-Forgiveness (I've got to save you! says Luke)

-Redemption ("You already have, Luke...You were right....you were right about me." Darth Vader so evil, but still was able to be saved by Luke's love)

This is the soul represented in Star Wars and the reason why that trilogy is so strongly a part of us....it takes the good/evil concept and puts it in such a striking way that is so easily understood.

It is also why I think Gen-X and the first part of Gen Y (me) are generally more warmhearted than the Boomers and their children :) ;)

^^ This is also a great reason why contrary to critical opinion, ROTJ is just as genius as the other 2 Star Wars because it brings all of these themes full circle in such a powerful ending in the throne room.