"Often, contributions to the art form show someone cavalierly overusing water in the sink or shower and are supplemented by statistics about the amount of water wasted every year. One variant features water wardens — like the 'Saturday Night Live' comedians Horatio Sanz and Rachel Dratch — dropping in on the bathrooms and kitchens of unsuspecting water spendthrifts," Barringer reports. There is one featuring toddlers from France, and another from Malaysia. Some use music; "Sesame Street" characters assist on others.
This following comes from the University of North Carolina, Greensboro:
Here's another from Kennesaw State University in Georgia: