How to demonstrate the cuprammonium process for making rayon for a high school chemistry class?

I want to get these kids interested in polymers by letting them actually see how it happens. Following all necessary safety precautions, I want them to shred up cotton balls for the cellulose with their own hands, pour the acetic acid and the ammonia into a bucket and stir with a piece of copper pipe and pull out a dripping mess of raw rayon. What I need is some background from someone who knows that process, the concentrations and amounts. We're not going into production, so it doesn't have to be efficient, I just want them to see ho wit was discovered.