Sumi-e ink painting is always a great value study. Diluting ink to get 5-7 shades of value looks harder then it really is!
7th graders were asked to create a wet-in-wet background with watercolor and then paint either bamboo stalks or a tree form over the background. At least 5 different values of ink had to be shown. We practiced traditional Sumi-e methods before we worked on our final projects as well as creating value scales from ink. 3D tissue paper "blossoms" were added for color and dimension.