Toast the bread over hot coals rather than high flames, so that the heat is able to reach the center of the dough before the outside burns; rotate the stick often to ensure even cooking. The bread will be done when it has a deeply golden exterior and sounds hollow when tapped—around 5 minutes, depending on the heat and how thinly the dough was rolled.
Get some rubbing alcohol, white coffee filters, a few clear glasses, scissors, and a wooden spoon. Next, head outside to find leaves that are at different stages of their color change — around 10 per color. For additional info, read more about this experiment at SciAm.