Some of us were assigned as the continents and were positioned in place by the shape of the map. Others took the role of "currents" and had to walk around in circles that ocean currents might flow. Slowly, the "continents" were given trash which they threw into the ocean and the currents carried around. Some items ended up on the shore of another continent and a lof of it had to be held by the currents. Eventually the currents had so much they couldn't hold it anymore. We talked about the 5 ocean gyres that are kind of like minestrone soup of plastic because the currents circle around them and that is where a lot of trash ends up, circulating in the ocean.