If she has room for them, I would choose the Wharfedale 12.2 over the 12.1. She'll end up with better bass and they can potentially play a bit louder or play with more dynamics. I use them in my den powered by a Denon A/V Receiver, and they do just fine. I do use them for both music and movies paired with a small subwoofer, but in a small room a sub might be optional (at least for a good while).
They represent a good sound for a small price. I found mine at Crutchfield for a "deal" before they increased in price.
The 12.2 aren't THAT much larger is physical size than the 12.1. Good luck whatever you choose to get her started on her journey.
Speakers for daughter
I was going to buy powered small speakers for my daughter's first sound system to go with A Project Debut Carbon Evolution but now she seems ok to accept an integrated amplifier from me to power speakers. Thinking about the Elac UNI-FI UB 51 or ELAC Uni-FI Slim B5 U5 after researching similar priced speakers such as the Elac Debut 2.0 B5.2, Paradigm Monitor SE Atom, Wharfedale Diamond 12.1, and Kef 150. I have not listened to any speakers yet at the price point. Any comments?