Don't these children have a free will? ;)
But we are commissioned to bring the Word of God to all. If we by negligence do not present the Word to the children growing up in such a method as they will understand it, or we drive them away, as in the case of of the abusive priests, we do not act as He has commanded us.
If, in spite of excellent upbringing and environment, the individual leaves the Church for other pastures, and cannot be reached, then it is upon his soul, and not mine.