Living prophets and apostles have promised magnificent blessings upon those who get involved in family history work and research.
Here's something we did for Family Home Evening. We printed out a copy of the template below for each person (they write their own name at the base of the trunk). We also printed out copies of pictures of our ancestors for each person (it's neat if you can find pictures of when they were in their 20s), that they could cut out and then paste onto the appropriate position on the family tree template. Then they write the names below the pictures.