I ask you all a question: Running a workshop on making plot work

On Saturday, I will be running a 45 minute workshop/discussion on the topic: Making Plot Work.

45 minutes.

I expect to have anywhere from 5 - 35 students ranging in age from middle school to college age.

Do you guys have any particular ideas?

I cannot plan on having a blackboard or whiteboard to write on. I would prefer not to bring a pile of papers to hand out or anything, and I can't assume that people will have pens to write with. Within those parameters (don't forget: 45 minutes), dig in!