Wow, what a fun time this was. Once she learned how easy is is to explore the "fan chart" of ancestors and to look at documents and photos others have uploaded for her ancestors, she lit up like a kid in a candy shop--no, more like me in a European cheese shop. FamilySearch.org's tools have opened up a lot of new possibilities for my mom.
Next time you have some time with your mother or father, why not help them get an account set up at FamilySearch and get them going in discovering and sharing? Hours of fun await.