When they reach the age of reason which is about seven, some mature earlier
and others mature latter.
When they can clearly distinguished between right and wrong.
So many people whom are intelligent are creatures of influence,
and if they started out on a wrong path, and know it is wrong.
They just follow the leader just out of human respect.
In the spiritual book, "The Way of Divine Love" a 10 year old
girl was sent to hell in the 1920's for reading bad books.
Unbaptized Children whom die before the age of reason go to a place
called Limbo.  They are separated from God, and because they
were guilty of no willful  personal sin, they are happy in their
state.
Children that have reached the age of reason, that have not been
baptized have a duty to get baptized. This is why they need to have
a good Catholic friend that will lead him to a Holy Priest.

God does not expect the impossible from any of us!  

Do you really believe that every properly Baptized child who has died at a young and tender age, knew a good true Catholic friend that could have brought them to the Faith.

God judges us on the opportunities He has given us.  

There are many people who post on these forums who haven't reached the age of reason yet.

I know my wife says I haven't!  LOL!

Quote from: Guest

Quote from: Guest

What happens to children who die unbaptized after the age of reason (7 or so)?

Everyone who dies unbaptized goes to hell.

Unless they are in Limbo.

Limbo is part of hell, but not the fiery part.

ALL unbaptized persons go to Hell.  Period.  The innocent (those who committed no actual sin) are in Limbo.  

Even if they are good kids who only have venial sins?

The Angelic Doctor holds that this is impossible. On attaining the age of reason, children either commit their first mortal sin with full deliberation or by considering their last end and directing themselves to it with divine help attain to the state of grace.

Whether venial sin can be in anyone with original sin alone?

...

On the contrary, Man is punished for original sin in the children's limbo, where there is no pain of sense as we shall state further on (II-II, 69, 6): whereas men are punished in hell for no other than mortal sin. Therefore there will be no place where a man can be punished for venial sin with no other than original sin.

I answer that, It is impossible for venial sin to be in anyone with original sin alone, and without mortal sin. The reason for this is because before a man comes to the age of discretion, the lack of years hinders the use of reason and excuses him from mortal sin, wherefore, much more does it excuse him from venial sin, if he does anything which is such generically. But when he begins to have the use of reason, he is not entirely excused from the guilt of venial or mortal sin. Now the first thing that occurs to a man to think about then, is to deliberate about himself. And if he then direct himself to the due end, he will, by means of grace, receive the remission of original sin: whereas if he does not then direct himself to the due end, and as far as he is capable of discretion at that particular age, he will sin mortally, for through not doing that which is in his power to do. Accordingly thenceforward there cannot be venial sin in him without mortal, until afterwards all sin shall have been remitted to him through grace.