For one of my last project I am creating a bonsai tree out of paper balls. The crumbled paper will be hung by string from a wire grid which will be hidden by a board of wood of the same size as the base. I chose to make an organic, natural object out of man made materials. Also this reflects how we should all recycle. So far the most challenging aspect of this project was creating the wired grid, the finished grid is quite morphed. So far I have not found anymore trouble, but I suspect a major concern would be creating an identifiable shape of a tree with the paper balls.