"Regular reading of and talking about the Book of Mormon invite the power to resist temptation and to produce feelings of love within our families. And discussions about the doctrines and principles in the Book of Mormon provide opportunities for parents to observe their children, to listen to them, to learn from them, and to teach them.
Youth of all ages, even infants, can and do respond to the distinctive spirit of the Book of Mormon. Children may not understand all of the words and stories, but they certainly can feel the “familiar spirit” described by Isaiah (Isaiah 29:4; see also 2 Nephi 26:16)." Elder David A. Bednar, "Watching with All Perseverance," April 2010