A.R.
I have a kindle and love it. My kids like to read so we downloaded the kindle app on both their iPads. They won't use them, at all. Say they hate reading on the tablet, they prefer real books. So I would suggest you get some books for her on your kindle and see if she likes reading on it before you buy her one.
ETA - I highly recommend BookBub - it's a service you sign up for and they send you daily emails of cheap (free - $2) books based on your preferences that you can get from Amazon or the Apple store (others too, those are just the only ones I use).