I am not an expert by any means on this subject, and I am trying to reconcile any emotions I have about this with Scripture. So please be patient with me, but I heard Albert Mohler, President of Southern Baptist Theological Seminary, who is a Calvinist, speak on this subject. He referenced Numbers 14:28-33

28 "Say to them, 'As I live,' says the LORD, 'just as you have spoken in My hearing, so I will surely do to you;
29 your corpses will fall in this wilderness, even all your numbered men, according to your complete number from twenty years old and upward, who have grumbled against Me.
30 'Surely you shall not come into the land in which I swore to settle you, except Caleb the son of Jephunneh and Joshua the son of Nun.
31 'Your children, however, whom you said would become a prey--I will bring them in, and they will know the land which you have rejected.
32 'But as for you, your corpses will fall in this wilderness.
33 'Your sons shall be shepherds for forty years in the wilderness, and they will suffer for your unfaithfulness, until your corpses lie in the wilderness.'

His argument was that God chooses/elects those infants that die before the "age of accountability" (or what ever you want to call it) and He does not hold them accountable to thier parents sins. I wish that they had not taken the speech off Mohler's web site, but unfortunately they have.

I hate making someone else's arguments for them because I usually get them wrong, so please be merciful in your replies. Anyway, what is your take on this?