Since we are originally Okinawans, we have, of course, been brought up hearing about tragidies in World War II they suffered in Okinawa, but they are only for the reminder of our grandparents. They have no chance to say this is peace. Kids are free while painting. It is very fun to them. We may not be able to understand what peace is while we are in a 'peaceful' circumstances.
Peace is indeed the counterpart of war.
The time was when there was an inner war in the country of Cambodia. They wanted to say we have to know what war is actually like even in a peaceful country. But they did not stay long there. What they did was only a few days stay, pretending to, so called, fight with a subival game. To them a war was just a game.