Unfortunately there isnt a whole lot that's geared specifically for that age range, and its star WARS so there's valeays going to be some sort of violence. But, there is a new animated series specifically for little kids called Young Jedi Adventures. I haven't watched it yet with my kiddo but its for 3-5 year i believe. I've heard resistance leans more kid friendly but haven't watched any of that either so not positive on that. I showed my 3 year old episode 1 and 2 and she did fine with both of them. Good luck!
Just wrapped up Rebels with my 5 and 9 year old and I think it was a good fit for that age range. Started Clone Wars after that and there have been a few times where I’ve cringed a little due to the amount of violence or choice of language. They say he’ll a couple of times.