One of the best presents a kid can give an aging parent
is a safety light. A couple of years ago, our son got us a motion-activated outdoor light and installed it in the hall outside our bedroom, so that it lit the hall to the bathroom and down the stairs whenever we stepped out of our bedroom.
Another good present I received from my kid was a subscription to the Geek Squad at Best Buy. He paid $20/month for me to be able to take over *any* electronic device which they would fix at no labor cost, whether it was bought there or not. I've used it several times to help me when I've done dumb stuff like locking myself out of my iPad by misspelling my own name. I think he bought it in self-defense so I'd quit calling him for help.
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“A grandkid”.
That’s what my sister says to her kids 
It might be mowing the lawn, cleaning gutters, planting flowers, cleaning the garage, getting the groceries, going out for dinner or cooking a favorite meal.
I did it for my parents and one of my kids picked up on it and now does the same for me. I don't need bath powder or a bouquet that only lasts for a few days or another sweater. This gift gives for a long time and is SO appreciated.
The only complaint? It doesn't include window washing. 
