I would actually say tell her to spend an hour or so just going into and looking at everything in every corner of everything program. Tell her to change settings and see what happens. Let her just mash buttons and put all sorts of stuff all over the place.
Then, tell her when she's done messing things up just to see what they do, tell her how to factory reset the phone and then she can pick what she remembers and liked. When it's your first time going into android, or first time on a phone, there isn't all that much that you "need" or can't delete. Just don't go getting All sorts of apps set up, just goof with the phone settings. Factory reset is an awesome way to let someone mess with stuff and have absolutely no fear of messing up anything at all that won't get fixed in just a little bit anyway.
And, tell her to just have fun!