Another idea on this topic, and I don't know if it has been
mentioned so forgive me.
Creating a dwelling(hut) as in a cave. Then paint the walls. This
actually would be a great tool to learn as an integration into
setting up an exhibit/installation in a museum. I have over 200
photos of the assemblage of the children's museum here. It is
culturally diverse, with
spaces pertaining to caves,pirate ships, woods (with trees you can
crawl into and climb up) anyway Jill I can scan a few photo's if
you decide to go this way. I'd say chicken wire, wood, plaster,
paint etc. Maybe center on the cave and tree photos.