Note: collaboration may be between you + collaborators/participants, you + audience, you + your future self.
Present participants with Items to place within predetermined categories (closed), categories they make up (open), or into predetermined categories with the ability to add their own (hybrid).
Choose Your Own Adventure*
The situations and contexts are all set and the viewer has freedoms within the constraints.
A combination or collection of various things. The new composition may possibly make a statement about the found objects and about the (unknowing) collaborator who produced them.
You don’t see what comes before you, and only see the connected parts afterwards in a grand reveal for all participants.
You intentionally misunderstand what the person before you said and twist it to be your own thing that makes less sense.
Present your audience with a few predefined options so they can decide what they'd like. Conditions can be offered to help them choose what answers are most correct in the current context.
Leave a piece of the puzzle to be filled in by the viewer. The piece won't actually be 'complete' until it is actually viewed.
You see a few lines written before you, and use them as the beginning half of your poem. Your lines become the beginning half of the next person’s poem.
You keep a running log every day of the current conditions, though some entries you have to assume/make up/act as if you know (since there's no way to know due to bad weather).
*The participation required actually makes the experience more valuable to the viewer.