She is 10.
What is she wanting a tablet for primarily?
For reading?
If so, then the Kindle. Or Nook HD.
A Nabi is going to be too "kiddie" like and outgrown too fast. Just my opinion.
Here is a link for comparison:
http://www.wired.com/geekmom/2012/12/nabi2-kids-tablets/
The other thing is, your daughter is 10. And no matter what tablet or tech gadget she has, even if that is a cell phone, you simply have, RULES for her about it. And if she can be trusted, than all the better.
And if she is aware... of the internet and tech concepts and usage, then good.
ie: from Kindergarten, the students at my kids' school, are taught about cyber safety, about internet use, about computer use, about the terminology, etc. And at home, being we are a tech family, we have always... taught our kids, about it. And about online safety and about tech gadgets and proper usage etc. So, now my kids are 7 and 11, and they are very savvy... about it all, and know, our rules for it. And they abide by it.
Sure, you can have parental controls on gadgets etc. But also, a kid needs to be taught about it, and told, and have rules about it.
Too.
And in school, with my eldest child, they do have to go online to do research etc. and find things online for school assignments.
My kids use our computer, iPad, iTouch, and they have Nook HD's which they got from a relative for Christmas last year. And we and they have no issues about it or how they use it.
And in school, even my 2nd grade son, they use the computer in school and the school has iPads.
So a "tablet" for them, is just another extension of tech usage, which they learn how to do. Aside from parental controls etc. on the gadgets.
Your daughter is 10.
Soon she will be in middle school.
Get her something that will last. Not a "kiddie" tablet.
My daughter is 11.
None of her friends, use Nabi's.
They are all quite versed with "regular" tablets and Apple products/tablets and Samsung Galaxy products.
Think ahead... and per increased need to use it when she is in older grades too. For school assignments too etc.