Homeless kids have it tough, either they were born into a life of poverty or something went very wrong and they had no one left to go to. Doing small things for them can go a very long way, like on missionary did when he was in Brazil.
He was walking to a cafe, getting his morning coffee when a little homeless orphan tapped his arm and ask for something to eat. He took the kid to the cafe and let him choose out anything he wanted to eat.
After a while a very deep thought struck his head and left him wanting to do more for the little kids.