Another quick knit is a pocket tissue cover for her purse. Just knit a rectangle and fold over and seam. They also make quick little gifts for teachers and friends and a great way to use novelty yarns or practice some cables. You could also add a little pocket to keep hand sanitizer as well.
What about Amy's I-pod headband? I was browsing the selection of the Fixation at my LYS yesterday. They had some really fun colors. They also had a simple baby hat made from Fixation. Maybe they would like to knit for charity?