Pencil on paper
There was a class at SMFA I always wanted to take but I never did. I don't remember what it was but I do remember my friend Julie took it. I remember they had to draw things like cracks and spots on the sidewalk -- mundane things in everyday life, but pretty interesting and complicated when you draw them.
Our house is almost 300 years old and with the original wide floor boards, we have a lot of cracks. Perfect to draw.