Natural materials like sand, soil and some leaves. Lots of different little bits of fabric and some cotton wool. If you're going to stick down your collage, you're going to need some glue ...

We're going to make our collage out of what we find outside ... Now we are ready to add our natural materials. Add glue along one part of the swirl. Then stick something you found to your picture.

Back before modern commercial dye existed, people turned to natural materials, like tea leaves ... If you want the stained-glass collage to be on the darker side, then go with black tea.