Several years ago, Danny Akin and Albert Mohler wrote a short article explaining why they believe children who die go to heaven. Today, Danny Akin offers a revised version of that argument, and you can read it here. Akin writes:
I believe that there are good reasons biblically and theologically for believing that God saves all who die and who do not reach a stage of moral understanding and accountability. Scripture may not speak to this issue directly, but there is sufficient evidence that would lead us to affirm that God receives into heaven all who have died in infancy. Some evidence is stronger than others, but cumulatively they marshall strong support for infant salvation. I will note six of them.
Read the rest here.