You might consider placing a single photograph or family album in a prominent place for people to peruse. You will be surprised at the memories and conversations photographs can evoke. Meals are excellent times for telling stories. You pretty much have a captive audience. Just don't monopolize the conversation, particularly in recounting details about the courthouses you have visited or your success in locating Uncle Ted's death certificate.
Children adore stories.
If you are a good storyteller, look for opportunities to draw the children aside to a quiet place where you can share a little family history in the form of a story. One of my favorite memories of childhood is of my aunt telling about when she was a little girl. She would tell us about traveling to visit her grandparents for the holidays and about the types of toys she received and played with as a child shortly after the turn of the century. The stories you tell now can become cherished memories and may be the spark that ignites a lifelong interest in family history in a new generation. End of the Day.