In this experiment, you can change copper into "silver" and then into "gold". Most the people i know enjoyed doing it, this is not the exact recipe i used, but it is supposed to work just as well and is safer to do. What you need: A Pre-1983 penny. (it contains more copper) Vingar Tongs(with rubber handles) Bunsen burner Ceramic dish Zinc Cloride(a soild, not a solution) First; be sure you select a genuine copper penny. Modern penies are copper-clad zinc. I think they were introduced in about 1982. Use a file to scratch the edge of the penny. If a silvery metal is exposed, the penny is too new. Get one of the older solid copper pennies. Clean it with a tuft of very fine steel wool. What you do: First, clean off the penny with vingar and possibly fine steel wool. Next, heat the penny over the bunsen burner until very hot. Drop the penny into the dish of Zinc Cloride and stir it until the entire penny is coated(or as much as possible. You cannot reheat it to add more zinc cloride) Pick up the penny(now "silver") and hold it over the bunsen burner. As soon as the penny turns "Gold" remove it from the heat and cool it with water. You may also buff it with iron wool to make the effect even better. *Disclaimer* Be safe: do the operation in good ventilation, avoid breathing the zinc chloride fumes, wear safety glasses, and properly dispose of the rest of the zinc chloride. Have fun! ---pineapple P.S. If anyone does this, could you please post your results and reaction to it? As i said before i have not done this same recipe so i would like to know if this one really works.