It should be done by all the schools, especially the ones in big agglomerates, where the kids mostly see bare earth and cement. It should also be free, in order to permit all the kids to go. It must not necessarily last for three days, also a single day from time to time will do.
I wonder how much they are taught about their own country, apart from history of course; the geography of the country including flora and fauna?
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela The desire for equality must never exceed the demands of knowledge