God does reveal Himself to all but men's hearts are hardened. They cannot accept the truth until God changes the heart and instills the faith man needs to believe.
Many take comfort in believing a young child who dies is guarantee a spot in heaven. There is no biblical justification for this view. It leads to Arminianism and Erasmus' erroneous point of view. It also states that there are "other ways" to heaven besides the cross of Christ which is implied in the "free pass" idea.
That being said we can take comfort in knowing that our Lord is wise, merciful and gracious. He will make the perfect decision. Whatever that decision is God justifies everyone through the blood of His dear Son. God can instill a baby with His Holy Spirit (Jeremiah and John the Baptist are examples) just the same as He instills us.
Thanks, and that solves the apparent problem concerning the seeming lack of God-enabled faith.