It's a Japanese tradition to tie wishes to a living tree for goodluck and as an offering. Wish trees are typically living trees with small notes tied to them by strings, but I suggest we move this concept to our urban-jungle.
By designing our cardboard tube strcture futrher to accomodate more branches and great height, we could turn it inot a posting site for visitors to attache their wishes/thougghts/quotes/secrets to. A public wishing pond; making our installation a project that is changed BY the public over the evening, and further has a end result that we can display and show as a product of our installtion.
The design process would be to
1) further develop the integrity of our trees and the density of the branches
2) create a design for the wishes and paper that can be attached to the trees
3) record and develop a way to display the results of the project
This is an easy, efficient, and effective concept that can be both interesting, progressive, and easy to accomplish well. If we were able to use photography and film over the night, we can show the project after the installation as a secondary project/follow up to our installation; showing the trees being filled up by people and how people mingle and walk through the space. All the tags/pieces of paper/wishes/thoughts/secrets/etc. could then we taken after NB and put on display or recorded as its own artifact.
A fractal-forest of cardboard tubes that becomes denser over the evening from use and people visiting. It will grow and transform with each visitor. Cost is cheap, design is cheap and most items could be donated. The theme of whatever is written on the pieces of paper/cards could be specialized by what we want and our own desires.
Food for thought.
http://en.wikipedia.org/wiki/Wish_Tree
-PB