I tend to look at it from a perspective others may not have considered before.
Revelation 20:11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire. This is the second death.
15 And whosoever was not found written in the book of life was cast into the lake of fire.
The first thing to take note of is this----and the dead were judged out of those things which were written in the books, according to their works---and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
In order to even be at this judgment, where this judgment leads to many getting cast into the lake of fire, there has to be books, where in these books there are recorded deeds done by the dead being judged. As to babies that die as babies. What deeds could possibly be written in these books about them that they are then being judged about? What works could they have possibly done as babies, that they would be being judged according to? Zero that I can think of myself. Therefore, and I can't speak for others, but speaking for myself, I am left to conclude but one thing, and that one thing is, all babies can die and go to heaven, every single one of them.
Maybe others require more proof. I don't. The above adequetly proves it to me, because no baby that died as a baby could possibly be at the judgment recorded in Revelation 20. Because no baby that dies as a baby could possibly have deeds written about them in books where God is then going to judge them according to the deeds they did before they died. The above in Revelation 20 makes it abundantly clear, every single person at this judgment, without exception, have their deeds recorded in books, and that they are all being judged according to these deeds they did in life recorded in these books. And once again, this couldn't possibly be applicable to babies who die as babies, since it is nonsensical to think that babies that die as babies, that they have deeds they have to answer for.