To understand suffering and hardship read the book of Job and the story of Joseph in Genesis (in prayer). Also, you have to think that those who are poor are more likely to receive the Kingdom of God than those who are rich, fat, and full of themselves. Many times when we go thru trials of suffering, or we go thru some type of painful situation, we learn something great from it spiritually. Also, we have to understand that this world is not God's Kingdom yet. This world is man's kingdom under the ultimate rule of the devil. For when Adam rebelled against God, the world fell into sin and corruption. However, there is a second Adam named Jesus Christ whereby thru Him, we can be a part of a new kingdom one day, where there will be no more pain, suffering, sorrow, death, disease, etc.
In addition, God is God because He knows the grand design and tapestry of life that you cannot see. Otherwise He wouldnt' be God. Atheists here who point out that God does not care about the children who suffer do not know the love of God and how he does care. God cares more for than just for our temporary needs that can lead us down the wrong path. God cares ultimately for our eternal and spiritual needs first. What are these needs? It is a relationship with God. For God knows what everyone needs for the best good to lead them into a relationship with Him. Each person is different. But God knows every single one of them. Some will never accept God no matter what. But that is their choice.
Also, when we help the poor (As believers), we are doing so unto God. We are showing our love for God. It is a selfless act in helping those who are in desperate need. This is what Jesus Christ did for us on the cross. Every man is in desperate need spiritually to be saved. Jesus (Who is God Almgihty in the flesh) died in our place so as to help us who were poor spiritually. We are to be like Christ and walk as He walked. Loving all others. For to love is to know God.