Robbie Barrat created house plant generated sketches using their electrical signals and an arduino. I like how it references nature and generates a aesthetic, unique, and simple sketch. After you attach the electrodes on the leaves, you use voltage readers to read/graph the voltage. "Use template.pde as a base program for your artwork; while in the draw loop, you can get the value of the plant anytime through the variable plantValue (which is a float)." There isn't enough examples of this piece to understand the effective complexity. I think that it is has balanced disorder from the uniqueness of the plants, and I assume that other plants will have vaguely related looking sketches based on the same algorithm.