How if I had only one material, like this banana peel?
I let them be darker for 1 day, hanging on my rack. And then I have a silhouette material :)
It was so windy outside my house, and then I found flowers were spread around on the ground.
Pindang egg shell, orange peel, veggie & flowers
How about a poster of Elephant facts? It would be more attractive & "green", because it was compiled from compost material.