I’m not a huge star wars fan so maybe not the best person to be answering this, but Disney Channel had that Clone Wars series for kids years ago, maybe it’s on Disney+?

Just about any of the animated series on D+. Do you know which era they like? I was a prequel kid, so Clone Wars was my jam, but if they’re into the OG, Rebels would defo fit the bill. TW: Clone Wars and Visions contains scenes of decapitation and dismemberment. Cauterized lightsaber style, and with fast cutaways, but if that’s not cool by you, be warned.