I've never understood how one can teach their children to pray without presuming their regeneration. God does not hear the prayers of the wicked. Wouldn't teaching someone whom you assume is not regenerate until they reach a certain age when they can "comprehend" be having your child heap up condemnation on itself?
It is simple, of course God hears the prayer's of the wicked. But wicked can mean one thing in one context another in another text. I would argue those verses are about those who know the truth and are outright rebellious like Sodom. Children have a special place in scripture. I think the Bible makes it clear. After all look at samuel. He was raised in a godly home sent to work as a priest at a young age. Regeneration is a sovereign act of God not a decision.