My suggestion since you are going to be demonstrating to a variety of quilters, new and veterans is to make as many as possible of each and every step. The more visual examples you have, the less explaining you have to do. I have made one of these trivets before. I would have them numbered 1,2, 3 ect. I would have one just cut components, another with the first layer, another with the second layer, one halfway done, then one with how to finish around the edges. I don't think there is a need to show how to finish the binding. That's pretty much the same on quilts, except for the bias.