So, what happens when those children of God die before they reached their third birthday?
I have not been privileged to see what happens to them. I would, however, be interested to know how you have come up with the age of three. Mormons believe that it is at the age of eight that they become morally accountable. I think that is too definite because we all reach moral accountability, to know for an absolute surety what is right and what is wrong, at different times. A difficult test in a world that teaches that which is wrong as something that is right and normal. Thank goodness that men did not have a hand in devising our morality in the beginning. if they did it would be all over now as sex relationships would bring procreation to a halt. When I grew up things were more clear cut. We knew right from wrong, which was backed up by our parents and environmental conditioning.
I do not know for a surety what happens to those who die before the age of accountability, however, I can give a reasoned guess based on my knowledge of the scriptures and the communications of the Holy Ghost, but that would be pure subjective reasoning and speculation that would no doubt induce you to critique my opinion, and rightly so as I do not possess that knowledge. It is not absolute, like the existence of God is.
Lastly, I do not feel that it is a question that needs to be asked when we considering the reason for our existence. It does not appear to have any relevance to the Plan of Salvation. To know that God lives and to know that He loves us is sufficient to know that a child who dies at age three will, undoubtedly, be taken good care of.
We have two cases here
1) they gain eternal life anyway. Even without that alleged necessary experience. Which would make that experiences not so necessary to start with.
If they die before the age of accountability, when ever that maybe, then they cannot be judged for for any immoralities as they are to young to know what they are doing. That being the case they will return to God having no blemishes on their garments. A perfect spirit having no sin. Their destiny will be eternal life, to live with God, the eternal Father, and His son, Jesus Christ.
2) they do not. They die forever, get a second try. Reincarnate. Whatever.
I do not believe in reincarnations and I do not believe in any second chances. God does not even insinuate any second chances, indeed, the opposite is true. This is it. This is our time to prove ourselves worthy to live with God or to be given place in one of the lessor kingdoms of God where our progression will be dammed.[/QUOTE]