Linda, I often wonder about state supported people in nursing homes. My Dear Dad is in a home now with Alzheimer's and my Mom looks after him daily. But, we notice others who never have visitors, let alone someone who brings them things they need. Lap quilts or the easily put on shawls are a great idea. I would think simple patchwork squares of 8.5" or 12.5" squares would be greatly appreciated and go together quickly. SITD or tieing them also would speed the quilting up. Pretty sure noone cares if they are perfectly sewn. It's the thought that really touches hearts. God bless you.
PS: knee replacements are worth it. I have had both of mine replaced.