The church that Jesus set up is called, in the scriptures, by many different names, such as, The Kingdom of God, the new Jerusalem, the church of the first born, the church in the wilderness, the church of Christ, the little flock, etc. There are no requirements for man to enter into heaven because it is by grace, through the faithfulness of Jesus going to the cross, and that not of man's works. Little children are completely dependent upon their parents and children of God are required to be completely dependent upon God to enter the church, at least, that is the way I see it.. All people are born naturally into this world as sinners after the nature of Adam's sin. Little children are regenerated, not of their own choice, just as the adults are, as described in Eph 2, especially verse 5, while they are still "dead in sins", having no ability to choose spiritual things as indicated in 1 Cor 2:14. All babies that die are regenerated children of God, because the wicked do not die in their youth, but grow to be old (Job 21:7) - Wherefore do the wicked live, become old, yea, are mighty in power?