If the 13 year old is into magic girl anime, Pretty cure might be a good one to check out. It has a massive franchise. I would go so far to call it the pokemon of magic girl anime.
Though only the first gen got an english dub, meaning it was much bigger over in Japan.
I was really into it for a while, still am since I'm watching one of their later series, Happiness charge precure.
Though the one that got a dub(and a prett decent one I should add) is titled
Futari wa pretty cure. I was able to watch all the episodes over youtube. Though it's been a few years, so they might not be up any more.