God commanded our ancestors to teach their children, so the next generation would know his statutes, even the children yet to be born, and they in turn would tell their children. Then they would put their trust in God and would not forget his deeds but would keep his commands. Psalm 78:5-7
God has appointed parents to share his Word with their kids. Parents have the amazing responsibility of leading their kids to know and believe the glorious truths of the gospel. The family is our greatest mission field.