We could focus on family traditions. For example, stories about how a family passes down a special recipe from generation to generation. It shows the continuity and connection within the family.
Another appropriate topic is family achievements. Such as a family member who overcame great difficulties to achieve their dreams, and how the whole family supported them through that journey.
Family travel adventures are great topics. Like the time when a family went on a road trip and had all kinds of interesting encounters along the way, from meeting new friends to exploring beautiful landscapes.