I wouldn't give a 10-year-old an RPG with all the bells and whistles of TP-based combat, skills etc. Give her adventure games made in RPG Maker, which don't rely on numbers, but rather story and puzzles.
You Are Not The Hero is a story about a girl who must complete mini-games to save her town. It's light gameplay, really fun, and well-polished. The only drawback is that it's fairly short, since it's a demo.
Pirate Rush is quite noob-friendly, and though it contains battles, it is done in a fairly intuitive manner and holds the player's hand every step of the way. She may enjoy this game since it is friendly to beginners of the genre, and contains minigames like fishing. Again it's a demo, though.
That's called Halloween Flop.
Halloween Flop is a cute and tiny game, but it requires knowledge of TP costs, elemental advantages, types of skills and other RPG tropes. It's actually one of the more complicated battle systems despite its cutesy art style and topic matter. I wouldn't recommend it to a 10-year-old girl due to its complexity and possibly scariness.
Princess Princess is a fairly light-hearted adventure which eases you into gameplay. I don't think she'd be too confused by it, and I think she'd also like the story since it's very cute.
Edit:
Legionwood 2, despite its combat system is a very nice story that kids would enjoy and a gameplay and world that they would love. It's also very long, if you're looking for something that's not a demo and can be finished in 10-15 minutes.
The Grumpy Knight, or on that hand, anything by Indrah, has a nice beautiful and cute atmosphere.