We did Star Wars about that age. She had to have it in small chunks. Actual order of watching was as follows:
IV…long gap of a couple of years I think maybe IV again… gap …VII, IV, VIII, V, VI, IX
Obviously this is a bit nuts but I thought Rey would get her interest more as she is less impressed with male-led stuff quite often. It did but she remembered there was a film with Leia younger so we watched that and then I convinced her to watch The Last Jedi, which she loved. But she wanted to see young Leia again so Empire it was.
Due to the trailers for Episode IX I thought she’d better watch Episode VI to understand who the emperor was. She seemed to enjoy IX. But she asks so many questions in these films. She finds it very hard to keep track of characters in films that aren’t animated.
She did claim she wanted to see Episode I the other day because of course she now understands that there must be a 1,2 and 3. 