I did this too for my daughter in her second year of college. After bringing the Winxp laptop home fully infested with spyware. At the time I was using mepis. Quickly showed her around and sent her back to school. She had a few issues, but her school's computers had OpenOffice on them so no issues there. She was virus free for 3 years, playing her mp3s and sharing photos etc. and the techs at the school loved it that someone other than they used linux. Her senior year she got a mac - so instead of saying "I have a Linux Box", where she would get looked at by others saying "WTF???", she could now say "I have a mac", and they would give her a sympathetic look and pat her on the head and say "We understand".
The point is she understood what she wanted to do and figuring out how to do it whether or not it is Windowsx, Linux or MacOS is not that difficult anymore.