Save the Children
How does God save the children who die? Are those who die, up to a certain age, given immortal life because he considers them too young to understand, or even commit, sin? Does he automatically give them eternal life and allow them to enter heaven? On the other hand, will he take care of them at another time?
Matthew 18 and Mark 10 states we must become like children to enter the Kingdom of Heaven. From these verses, some conclude that God will immediately save infants and young kids who die. Jesus said the following.
Notice that Jesus did NOT say children are automatically saved upon death. He refers to two things that are needed in order to enter into eternal salvation. They are conversion and possessing the humility of someone who is very young (verse 15). It is very clear that he was merely using very young humans as an example of the attitudes and attributes a person should have if they want God to save them.
Age of Accountability
Determining at what age an individual becomes spiritually accountable for what they think and do is IMPOSSIBLE for humans to determine. This is because only the Father knows the intentions of a person's heart and he knows what people comprehend. For a person to have a belief, there must be some understanding of what is to be believed (see Mark 1:14 - 15).
To repent a person must have an understanding of what they are repenting of and what is the gospel. During one of his missionary journeys, the apostle Paul and Silas were thrown into jail. While they were singing hymns at night, a miraculous earthquake occurred that not only freed them from their shackles and cell but also broke the chains and opened the cells of ALL the prisoners! The guard of the prison was in such awe of the miracle that he ran to Paul and Silas, fell down before them trembling, and asked what it would take to become a Christian.