I've asked myself, and a few pastors I know, those same questions and its a very difficult one to answer because so many people want to blame God. We all seem to forget that God isn't the one starving, assaulting, selling, etc... those children, its us human beings...they are choosing to do those things.
I'm not saying that there aren't days when I wonder how much suffering is enough? "When will God get fed up with it and begin the trials and tribulations, are we already in that stage or are they still to come?" and "When will the rapture happen?" are questions I've asked myself a lot.
God doesn't want us to just accept things as they are...He tells us to be like children and children question every single thing. He has a plan or schedule of events, or whatever you'd like to call it, but we don't know what it is.
The Bible gives us hints/clues as to what is coming and when but nobody knows the whole plan except God.
Great comments @frostyamber! Thank you for your contribution to the discussion. Would love for you to join in the discussions in the second post here too.