This is a fulfilling and long-term activity residents can start on their own. Plenty of resources exist online now to help residents do research for their family tree! The best way to start this kind of project is to help them jot down the family connections they can remember as a start. After that, use online resources like Ancestry and FamilySearch to deepen your search and keep track of your findings digitally. The beauty of a family tree is that it can be as involved or as relaxed an activity as residents want. Some services even provide DNA kits which residents can use.
Check out the original idea here.