Ask everyone to bring an updated picture of their family, along with a index card listing any accomplishments or changes from the past year. Put all of these index cards and pictures onto a large display, making a small family tree to show how everyone is related. This idea is perfect if there are a lot of family members in attendance, many of whom live out of town. Although many of the older adults might know who everyone is, younger family members might not know all of the connections.
Have an award ceremony during the reunion. Give awards for the oldest and youngest family members, to whoever had the furthest to travel and even to the longest married couple. Use this awards ceremony to recognize special accomplishments such as graduations or new births.
Another way to encourage family members to become reacquainted is to have older family members share their memories of their childhood, deceased members of the family and even memories of each other. Have someone record and type the stories. This can become one of the highlights of the reunion and a way to preserve family history.