In this activity (p.23 of PDF), learners dye wool with fungi. Learners discover that natural chemicals in fungi can dye wool different colors. Note: Natural dyeing normally requires a color fixative such as alum. This is not necessary if you use an aluminum, tin, or copper pot as the metal in the pot will take part in the dyeing reaction. However, if you use a non-stick saucepan you should add a few copper coins to the mix. Safety note: Always wash your hands after touching fungi! Adult supervision recommended.