I have the same problem with my old folks. They suffer from the cold, so I just bought some of them snow mittens with a liner glove. Last year it was battery-powered handwarmers. The previous year it was shearling slippers. I'm considering earmuffs for my Godmother, who doesn't like hats.
What music system do they use? If they're still into CDs, maybe a CD of their favorite era?