What a cutie. I am not entirely sure she's as old as you think. Based on this picture, I would put her at 3 1/2 - 4 weeks. I still have my heating pad in with the kittens. Just make sure she can get away from it if she gets too hot.
Also, when it comes time to litter train her, use only non clumping litter. Just like human babies, everything goes in their mouth.
Also, when it comes time to litter train her, use only non clumping litter. Just like human babies, everything goes in their mouth.