The students play with the differences between abstractions and concrete nouns. Writing concretely is an important step toward writing vividly. See my Atlantic article on the subject. http://www.theatlantic.com/national/archive/2012/10/the-secret-to-good-writing-its-about-objects-not-ideas/263113/
This game helps train students to be vivid and specific and keeps them from floating away on a tide of abstract ideas.It requires a white board and an actively listening instructor.
You do it after several hours of instruction in concrete nouns and abstractions. I did it last night about halfway through the second class of my current once-weekly course. It took about 30-40 minutes. Very successful, at least last night.