When you are travelling in Sri Lanka specially while trekking you have a chance to meet local people. Get the chace to be happy with direct charitable donation to people in need.
You will meet serviving village schools in Knuckles Range, around Kandy or anywhere which really need donations to keep it going on. From your homeland you could bring new or used English language books or other types of educational mattirials or you could buy them here.
You could support us or working together, we can protect Knuckles Mountain Range. We could build and maintain hiking trails with forest department and conserve natural landscapes, and ensure that tomorrows hiking experience is even better than today.