Gift desparation time

So yeah, Christmas is less than two weeks away, and I've got presents pretty much "wrapped up", so to speak... except one. What the heck am I going to get for my mother?

This is a trickier proposition than it might appear on the surface. I have a few simple rules for procuring presents:

1. Get at least one present for each person at the gift-giving event
2. Each person's total gift should meet a minimum monetary value (this year, about $15-$20), but feel free to spend more if it "makes sense" (e.g. the ever-elusive "perfect" gift for someone)
3. Gifts should be enjoyable, but shouldn't be needful things... toys, games and food are all good gifts, while knives, cookware and appliances are not so much. This rule has the most wiggle room... cookware for somebody who makes a hobby of cooking is fine, as it might be for somebody setting up their own house for the first time

My mother is getting on in years, and may well end up putting her house up for sale shortly to move into an assisted-living sort of place... but her house has 40+ years of accumulated "stuff" squirreled away in odd places, so the last thing she needs is more stuff. Consumables would be the obvious second choice... but she is significantly overweight, and tries to combat that as best she can (mobility problems, in part due to weight), so the box o' chocolates is right out. She's already told us all that we don't need to get her a present, but that's not right, either... I've been on both the giving and receiving end of no/cheap present, and neither feels particularly good.

I suppose there's always the gift certificate route... but I hate giving something like cash, but less useful... and, of course, cash gifts are taboo, unless you're a shut-in due to health (as opposed to a hermit by choice, like I am). Oh well, here's hoping I come up with a good gift idea before the big day hits.