Open your drawers and cabinets in your kitchen and look for something that might suggest the essence of collaboration.
Maybe it is the item itself, or how you arranged them. Share it in a photo!
What happens if you are not home, not near a kitchen? Easy. Just find some implements or tools or items around you that you can use to create an image. The important part is the metaphor, not where you get the objects.

flickr photo shared by cogdogblog under a Creative Commons ( BY ) license
Tweet your response to @OntarioExtend and be sure to include the hashtag #oext3
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