In Alma 5:6-13 we learn the importance of Family History and understanding how the Gospel has effected the lives of our ancestors.
6: And now behold, I say unto you, my brethren, you that belong to this church, have you sufficiently retained in remembrance the captivity of your fathers? Yea, and have you sufficiently retained in remembrance his mercy and long-suffering towards them? And moreover, have ye sufficiently retained in remembrance that he has delivered their souls from hell?
7: Behold, he changed their hearts; yea, he awakened them out of a deep sleep, and they awoke unto God. Behold, they were in the midst of darkness; nevertheless, their souls were illuminated by the light of the everlasting word; yea, they were encircled about by the bands of death, and the chains of hell, and an everlasting destruction did await them.
8: And now I ask of you, my brethren, were they destroyed? Behold, I say unto you, Nay, they were not.
It's important that we teach our children their family history. Studies have shown that when children know their family history and where they came from, they have a better sense of awareness of who they are, and can grow from those experiences of their ancestors.