I just find it interesting how other people do stockings/Santa... For us, it was always one small present that fit in the stocking, and then the stocking had an orange, peanuts, and some chocolate candies.
For a friend's family, Santa was so busy on Christmas Eve, that he would save their house for later and come on New Year's Eve (so the parents, uh, Santa, could get the candy half price, and any stocking stuffers on after-Christmas sales).
Anyway, I see stocking stuffers as being small items that truly fit into the stocking, so pocket knives/gerber/leatherman type stuff, a necklace, bottle of fingernail polish (if they like that stuff), a small game, things like that.
And good for her for pursuing the programming! I learned when I was in Jr. High (using basic, lol) and it's a skill that helped me well in my career.