Telling the child this would also be on my list. Is this usually part of a Calvinist religious education to children? How young would they be when informed?
Isn't that why we baptize babies, to commit them into the hands of God? Well at least Protestants do. I believe Catholics baptize them into the Church.
All a person can do is give the outward call of God. We can share the message but we cannot change the heart. God must do that if He so wills.