There is an age of accountability that is appointed for ALL of us (the time when Christ knocks on our heart's door and desires a relationship with us.) For young little children, they are pure for they haven't reach that age of accountability. I've known children who have passed at a very young age, even young babies, right from the their mothers womb who have passed.
"Take heed that ye despise not one of these little ones; for I say unto you, That in heaven their angels do always behold the face of my Father which is in heaven." Matthew 18:10
[SUP]"[/SUP]And Jesus called a little child unto him, and set him in the midst of them,
And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.
Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven." Matthew 18: 2-4