I guess we'd have to do some modifications to the key since the key aloe already has meaning assigned to it. Lets wrap some tape around it. Use a key we don't use anymore and remodel it a bit. Maybe add some colors. Quoting: (MaJorMan)
I like the idea of the key, though it is already assigned meaning, perhaps it would be preferable to use a key that you cannot recall it's purpose, or never did know what it unlocked? And yes, modify it, make it unique of course.
The Possibility would be our pockets. Though I think I shall modify it in a way that means I can wear it as a pendant or bracelet to increase the Possibilities for Interaction.
We could encourage Interaction by posting pictures online of our symbol, for those on the thread to view, or at least a description of our Symbol.
With respect to structure the only one which comes to mind right now is the intent to expose my Symbol directly to the sun everyday. At a time as close to midday as I can, for a minimum period of one hour. An other rule, will be to explain to any person that asks about this key, that 'this is a symbol of my wealth'. I trust that will lead to further discussion and therefore further interaction.