PC is pretty slim pickings for this kind of game.
I just looked at the top 50 PC action games on gamerankings.com, and literally all of them are inappropriate for children. I looked under rated "E," and they all seem to be pretty mediocre.
Some games you might want to consider:
LEGO: Alpha Team,
Lego Star Wars,
Rayman 2,
Harry Potter and the Chamber of Secrets.
I haven't played any of these, though I've heard very good things about Lego Star Wars if she's into that. Good luck!