The role of a suffering child (starvation scenario) could be many things. Firstly, like i said in my first post: maybe the spirit of that child will enter Heaven in a more perfect state due to his suffering. I don't think he or she will find a "better Heaven" just that because the spirit of that child has experienced such extreme suffering that their spirit has graduated up a heirachy of perfection. In the Bible it states that there are angels and arch-angels (like Gabriel) who seems to have a higher place in Heaven. Maybe your standard angel wishes to "grow" spiritually.... so they decide to return to Earth specifically to suffer. Now this is just my own theory... maybe it just helps me deal with the helplessness of knowing that there are suffering children But even if we stop the suffering of a returned spirit then that's ok too. God will rejoice in that too.
I won't comment on this first part because it's clearly your own personal belief and you are perfectly entitled to that.

Secondly, the suffering of innocents really makes most of us feel really humble. How easy is it for mankind to feel proud of all that he has done??? Oh yes we are good aren't we/ how clever we are... we can put a man on the Moon!!!... we are sooo clever. Oh but wait... we can't ensure that no child suffers from lack of food. Hmmm.... so, are we really that great afterall? What a valuable lesson. That's my big picture perspective.
Completely agreed that I feel humbled to the ground when I think about such suffering (Which I choose not to focus on too much, otherwise I?d go mad !) Anywhooooo, I am also hubled when somebody does something nice for me for no particular reason. I?m not sure what you mean by "what a valuable lesson"? Is the lesson to feel humility by suffering of such children ? Or that we ensure that no child suffers from lack of food? Not really a lesson that has been learnt. Sorry I don?t mean to argue the point but the reason that have been given for children starving, you know, so that we might get a clue, learn a lesson, really just seem a cruel way to teach to me???