Kevin, have you tried her out on Q-Tips? My cat Fletcher used to practically do baton-twirling routines with them.
With ours, for a while it was primarily rubber bands. We had to scour the house as he was so fascinated that he’d literally hunt them down in the obscurest nooks (we were petrified he’d try to eat one and cause lord knows what hassle for him and us). Other than that, he’s all about cardboard boxes, string, his sock full of catnip bud (cue grotesque sucking noises), and his tail. Unless we’re trying to get him to show off for an audience, of course.
Thankfully, he’s never shown the slightest interest in the toilet roll dispenser, though woe betide you if you’ve settled down in there for a quiet visit when he decides he simply must find out what you’re up to in there.