Well, with my own mother (61 years old), who is completely inactive (there is no way I could get her to walk 4 blocks!)... simple is good.
She likes to eat out and to sit around and chat. That makes her happy.
Why do there need to be games/outings/etc.? She might just like talking with you without all the other stuff going on.
Good luck.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"