Just thought I'd share this canvas that my students and I made a couple of years ago. It is one of my favorite collaborative pieces that we have ever created.
I pulled small groups to work on this. After we sketched the shape, we painted the background blue and the octopus orange. Then, we used paintbrushes to brush school glue over tissue paper. We also used an old sewing pattern. The sewing pattern is just like working with tissue paper and gives the most amazing lines and texture. Then, we painted pink polkadots and outlined everything. We worked on it while it was wet, not stopping to let any of the parts dry. It hangs in our media center.
I have fond memories of this because it was one of the first successful collaborative pieces I ever did with kids!