What about, getting him a walker?
You know, like these:
http://www.amazon.com/b?ie=UTF8&node=3776971
At that age, any elderly person, has to be careful of falls. They can break their hip. And they don't heal well after any fall.
This is for safety etc. And it will help him be more mobile, safely.
And you said he had a stroke.
My Dad had a stroke, and he had to use a walker.
He didn't mind. It meant, that he could walk.
Or, get him an iPod. So he can listen to music?
Or audio books.
And at this age and per his health, they get lonely too.
But yet, they don't want to be a "burden" to others.
Just simply having genuine company or companionship, is also what they miss.
Also, being he had a stroke, I don't know how it has affected his physical ability... but getting hand-bars in the shower and near the toilet for him... is ALSO very very, needed. Elderly, especially if they had a stroke, can slip and fall in the bathroom, and/or they will need help, with basic movements. We had to install handle-bars/grab bars in our bathrooms/shower/bath/toilet areas, for my Dad when he had a stroke.
Per his stroke, can he speak??? Can he eat or swallow normally?
My Dad could not do either very well, after his stroke. Even speaking, was very tiring for him.
Perhaps, getting him a whistle, or some kind of bell, would be useful too. So that, he can "call" anyone for help, if he needs it.
And/or a medical bracelet etc.
When a person has a stroke, it can really affect them emotionally. And they loose, mobility etc.
It really affected my Dad for example.
Any companionship he had, it really meant a lot to him.