This is a project my job share partner has done for a long time. The vase project is done with 2nd grade to discern separate spaces. These areas are filled with unique patterns using only sharpie. We encouraged directional line changes, as well as thicknesses. She has patterns that the kids trace from, so tracing and cutting usually take up day one. Day two, arrange vases and outline the overlapped spaces. Day 3 (and possibly day 4) filling each space with line design.