I mean, apart from spaceships, aliens, lore, weird planets, stories, action, explosions. No matter what you think of the series critically, it's silly to think kids want kid stuff. Like, the reason we loved Gremlins, Ghostbusters, Star Wars, etc, wasn't on the nose kid stuff - it was often the opposite and even when we didn't "get" the subtext or subversion, we sensed it and made our own stories in those universes anyway. Arguably the movies have more for kids than they do for adults.
The fact that there are young adults on this site who, with a straight face, claim the prequels are better movies than the recent three, is a fantastic example of how kids fashion their understanding of and attachment to movies. Some of the shit I loved when I was a kid bears no resoimblance to what I understood about it as an adult.
Ahmed is maybe making a good broader point, but Jar Jar, thanks to Lucas, was a perfect example of what not to give kids either as art or as instruction.