artisan des arts: Giant art mural - grades 2-6. Teacher laid out op-art mural and students colored in sections.
When you press the Crow Quill pen down more ink is released making the line thicker, less pressure the line becomes thin. Description from drawingandpaintinglessons.com. I searched for this on bing.com/images
Original acrylic on canvas painting by Stephane Bulan - Paris Art Web