This was a newish project I tried out with my 5th grade. The directions were to draw one line, this line can not touch or overlap. There was a full day with just practicing then they got the 12x12 paper and a sharpie to do the lines. There were mistakes in the drawing, but we let them go, It took about 2 weeks just for the lines. After the lines were done we drew some simple shapes and discussed value scale with the students and how each shape should have a value scale of a color. These are a few examples of how they turned out.