How can you make your hair look longer?

-My nan had her haircut by students in London and she had her hair cut too short and she really hates it. How can I help her hair look longer so she can just forget about it? Her hair is really light blonde and very fine/thin. I think maybe if I put moose in it, it will become thicker and appear longer? Please give me some ideas because she is really miserable and in a bad-mood and I just want her to be happy:-)Get a hairpiece. In order to help her hair grow faster, she might try pre-natal vitamins but make sure that they're okay for her with her GP.