What do you get grandparents for thier anniversary?

[Chandra Amaya]

They have been married for 27 yrs this year I think. They are both in poor health. He is pretty much in bed all the time. He has mini stroke several times a day & has trouble even standing now. She has heart problems & never learned to drive so any gift certificates are out. They argue all the time & don't even appear to be in love. BUT if we don't do something for them we will get the guilt trip for the next 10 yrs. Anyone have any ideas?