In Studio Made-Tools for Drawing
students are asked to bring in different drawing materials for the entire class to use in drawing the still life setup. Complication is created because none is allowed to use the same material in the same way, so each time a student obtains a new material, they have to upgrade the tool/material or personalize it in some way. Students are in charge of when materials change hands, they simply force a swap for something they think their drawing might need.