Yeah, it's not easy. And the past 6 seasons of anime, most are WAY TOO ADULT ORIENTED for her. I wonder if my cousin could explain to her that she might like Card Captor. Sailor Moon I can understand, because as a kid I didn't like it, but then again I am a guy.
Well, I used to play Guitar around her a lot, and if anything that was why I watched K-On!. She might be a bit young to understand a little over half of the humor, but I'm sure she'll enjoy it, she's pretty damn smart.
I tried Beck, but I just couldn't get into it. And yeah, knowing her, she'll probably run around as soon as she sees a guitar expecting me to be around, haha.