we don't challenge children to bring them to church,we have to open their minds .
acts 26:18
to open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.
you cannot challenge someone who doesn't believe in God,we have to first open their eyes to the reality of what the word of God says .
they should start acknowledging the existence of the almighty at their young age and serving him,there are evil days to come after thy youth ,so while we are still young ,we should serve God.
ecclesiastes 12:1
remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them;