Considering always that we are guided by the word of God, ee always depend on the word of God in any question or in any duobt that may arise in the mind of anyone. There is always an answer from the word of God that will make us realize that there is really God that exist, and what is happening is part of what He foretold in the Bible many hundred years ago.
Dying does not mean something wrong or something bad, if we are going to base our belief in the Bible.
Matthew 19:14
But Jesus said, Suffer little children, and forbid them not, to come unto me: for of such is the kingdom of heaven.
The kingdom of heaven is also open for children. Children are destined when they die as little children to inhert heaven, no question about that in the Bible. The Lord Jesus Christ even made the little children as examples of salvation, models of salvation.
Matthew 18:3
Matthew And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.
Adults like us should imitate little children, because according to our Saviour, except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.
There are something in children that will make it easy for them to enter the kingdom of heaven. You will remember that the Lord Jesus Christ in one instant says, it is very hard for a rich person to enter into the kingdom of heaven.
Matthew 19:23
Matthew 19:23 Then said Jesus unto his disciples, Verily I say unto you, That a rich man shall hardly enter into the kingdom of heaven.
The Bible tells us how hard it is for someone who is rich to enter the kingdom of heaven. By this, you will be finding a very great wisdom that the Lord Jesus Christ is teaching us Christians, and we have to consider this thing when He said that little children are for the kingdom of heaven. No matter the race, no matter their classes, so long they are children, they are qualified to enter into the kingdom of heaven.
Now if a child dies, does it mean something bad?
Maybe it is something that will bring grived to the parents or that particular child. But understanding the scripture and the word of God and considering His faithfulness.
Isaiah 57:1
The righteous perisheth, and no man layeth it to heart: and merciful men are taken away, none considering that the righteous is taken away from the evil to come.
Death comes, sometimes, by will of God, as something good.