Our work with surface currents included research on the world's gyres.  We modeled the formation of gyres using beads and water in a shallow dish.  By blowing across the water, we were able to create gyres that moved in both clockwise and counter-clockwise directions.  By blowing across the center of the dish (where the equator would be located) we were even able to make two opposite-spinning gyres at the same time!

demonstrating that prevailing winds create surface currents