Seniors of age 70 n more... , They usually like to roam around , like to read things (newpapers , magzines , etc ), and they like to play games like cards , chess etc.
Every person has its own thing to spend past time.... And these senior citizens usually get bored , while sitting doing nothing.
Maybe you can start small work( just to ease their boring hours) by asking citizens if they want to do and which work they want to do??