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.
Berlin grocery store, Original Unverpackt, is an experiment in grocering. They sell upwards of 350 products dispensed from refillable containers, while some of the liquids come in bottles with deposits on them. The store creates zero.