You can get her a new movie, a new game or a new book. If you are to get her a new book, make sure that it has both aspects of education and entertainment so that she does not only have fun reading but also learn. You can also get her new clothes or new shoes.
I Am 12 Years Old So I Think You Should Get Her A Facebook, Facebook Is Fun And You Get To Talk To Friends On it, If You Think Shes Going to Talk To Strangers or Something Just Ask Her Want Her Password Is And You Can Check On Her Any Time She Gets on To See What She Is Doing On Facebook Or What She Is Talking About With Her Friends. Or Get Her A iPod Or Some Think Fun Or Look Up something On Google.