From Crafty Manolo
"So what’s the moral of the story? Well, if you have a loved one serving overseas or if you contribute to care packages to support the troops, consider adding a ball of yarn, a couple of knitting needles, a chart or two, or even something like a tatting shuttle and thread to your offering. It’s a little thing, but it might be a real aid in helping someone stay sane and grounded in the midst of war."
I think this could apply even to care packages that are part of a relief effort. There is a more in-depth article at The Washington Post.