Egyptian metal designs (cardboard covered with foil, design taped at the top edge, trace design in a colored pencil, flip design paper behind, color in areas with colored permanent Sharpies and outline with black Sharpie)
Positive and negative shapes. My Zentangle hummingbird. This is an example for my students' project. This can be use for several concepts: positive / negative space, reflection, line and shape, etc. I did this project with my grade students.