Hi,
this is a Challenge for Berlin by Mifactori.
UPDATE: There is now a better DOCUMENTATION (Meta Level) for this kind of experiments/activities.
#Starting Point
In Berlin Neukölln a lot of people put their old furniture on the street. As garbage.
img “Sperrmüll” by 3268zauber, CC-BY-Sa
We run a design and construction start up called Mifactori. In Mifactori we have the Hiebo Design Series – dedicated to develop Open Source Circular Design objects.
We work a lot with screws and modularity by applying simple grids of 3cm x 3cm for screws to the parts or using the similar 4cm x 4cm grid of Open Structures.
From a Hiebo Design tutorial
Open Structures Grid, img by Lukas Wegwerth, CC-BY-SA
#The Challenge
We will go through the streets of Neukölln and collect old furniture items. Then back at the venue we will clean the stuff and drill holes in it apply the 3cm x 3cm or 4cm x 4cm grid. Transforming the stuff into some kind of reusable Meccano. 
Meccano, by Jorge Royan, CC-BY-SA
And we will build furniture that way that we will then donate to the CRCRL lab in Berlin.
Of course we will document everything properly and brainstorm a way to make the techniques we use, test and develop well known in Neukölln. So that more and more people start to pick up the stuff from the streets and transform it into circular solutions 
We will look for sponsors (for screws) to help us to create the challenge.
More Info Soon
UPDATE: If you speak german. @rhizom and I sold this as a workshop for kids to Neukölln. So we will already test the idea in March. Here is our workshop description. Feel free to copy it.
Zirkulärer Sperrmüll - Young Arts Neukölln - Muchina Zimmermann.pdf (1.2 MB)
