Scripture is not silent on this issue, we have the story of David's son through Bathsheba, we know when the child died that David said he would go to be with that child. David was a prophet, David KNEW he was saved.
We have the scriptures I posted, in Deu 1:39 God did not hold the children accountable for their parents sin because they did not know between good and evil.
Deu 1:39 Moreover your little ones, which ye said should be a prey, and your children, which in that day had no knowledge between good and evil, they shall go in thither, and unto them will I give it, and they shall possess it.
When the Jews sinned in the wilderness, God decreed they would all die and not enter the promised land. But he allowed the children who had no knowledge between good and evil to go in. I personally believe the Promised Land was an OT figure of heaven.
Isa 7:16 For before the child shall know to refuse the evil, and choose the good, the land that thou abhorrest shall be forsaken of both her kings.
This verse shows that children are not born knowing between good and evil, but at some point they mature and do. This verse refutes Total Inability as Calvinism teaches it, showing that even a child can refuse evil and choose good.
Jon 4:10 Then said the LORD, Thou hast had pity on the gourd, for the which thou hast not laboured, neither madest it grow; which came up in a night, and perished in a night:
11 And should not I spare Nineveh, that great city, wherein are more than sixscore thousand persons that cannot discern between their right hand and their left hand; and also much cattle?
In this scripture, God implies that he is the one who made little children, and argues that "should not I spare Nineveh". In other words, God is saying that it is JUST that he should spare Nineveh because there were 120,000 young children there who could not discern between their right and left hand and therefore cannot understand right from wrong. They were just as innocent as the cattle who also cannot understand between right and wrong and are therefore not responsible.
I could go on and show you much more scripture, but this issue is absolutely addressed in scripture. Those who say otherwise need to study.