Two hours isn't much time, and I can't imagine the organizers of the event expect you to do anything comprehensive. I would suggest picking a topic that you can focus on during that short time.
Whatever you choose, for me having completed samples of quilts or quilted objects would be very inspiring. If you are doing a project, have some finished ones available, as well as samples in the various stages.
The goal can be for people to walk away saying, "I want to do that! I can do that!"
Have fun!