C.P.
Hi S.!
Sorry to hear someone close to you is having to go through this, especially at a young age!!!
Put together a care basket for her - books, crossword puzzles, get a blank book and have all the teachers write their sentiments and well wishes for her so that she can read the book over and over again, snacks, candies, chocolates, soups...basically a bunch of things she'll need and appreciate while she is recovering. I am sure that anything, no matter how big or small, will show her how much yall love and care for her.