It is already 2017 but if anyone refers back, how about personalized aprons and baking tools?

Bowls: I'm a fan of the nesting melamine bowls--easy to store and lightweight.

Mixer: I've been very pleased with my Black and Decker (!), and it comes with regular beaters, whisk, and dough hooks.
http://www.amazon.com/Black-Decker-MX3200B-Hand-Mixer/dp/B00BIBBIH4/ref=sr_1_2?ie=UTF8&qid=1387766653&sr=8-2&keywords=mixer+black+and+decker

how about a pastry bag and several tips for decorating? Way fun for kids (my 6 yo loves it!)....

I love baking desserts. Get her Sticky, Chewy, Messy, Gooey by Jill O'Connor and you will all be richly rewarded. It has mindblowing and yet easy recipes.
There is a kid's treats Sticky Chewy too, but I have not yet made anything from since my kids are small, but bet she would like that one too.
Another great book is Cookwise by Shirley Corriher. It gets into food chemistry, not totally dessert focus.
Oh and also Tea With Bea by Bea Vo. Bea grew up in the DMV and moved to London where she now runs a high end tea parlor. Really great vanilla cake recipe and also everything you need to know about icing.
The Fannie Farmer cookbook is one lots of bakers cite as foundational.
Smitten Kitchen is a popular cooking blog with an associated cookbook. It isn't all baking, but books could help her branch out when she is ready.