Over 21 years of teaching history I have loved getting "my hands dirty" doing strange activities that would help drag students into the current lesson. This "pot" activity is just another one of my project-based adventures into education. Nothing about teaching is cheap but having friends 'in the business' as always helped me get the products that I needed for my class.
I have used this in my American history class, my Louisiana history, and a fellow teacher used it in his World history classro