Although the original request is some time ago, I wanted to share information about our tree that was inside one of our workshops. I had cut two general trunk and large limb shapes out of cardboard and fit them crossways so that they stood on their own. Then my brilliant "designer" and I took 10-12' pieces of brown (cardboard-colored) butcher paper and crumpled them up length wise and taped and stapled them around the tree frame. We used flexible conduit for additional branches, duct taping them to the cardboard frame and then running them up to the ceiling tile frame (wiring them on) so it gave the appearance that the tree top was above the ceiling. We then took all sorts of silk plant "bushes" and wired them every so often near the ceiling; while it didn't cover the whole tree with green, it gave the allusion of a leafy tree. It was so spectacular that visitors were brought down to see it! We left it up about three years and worked it into each workshop or VBS site.