God has commended the generations to influence each other ( Ps 22:30 and Ps 145:3-13) Calling of Abraham demonstrates God’s desire to invest in future generations (Gen 3:15-16, 17:1-7, 18:19)
Discipling nations would mean also discipling generations
Examples of hildren hearing and obeying in the Bible
The story of Samuel (1 Sam, Chapters 1-3)
The servant girl of Naeman (2 King, Chapter 5)
Little boy with fish and bread (Gospel of John, Chapter 6)