"First, the cardboard, courtesy of Glen at the local Smurfit Kappa cardboard factory. He gave us a pile of reject cardboard sheet (made from recycled paper).
We hoped to carve out a shape from a block of cardboard but a test showed that it didn't leave a nice finish. So, we modified the design to use only squares, and got the rulers, set squares and Stanley knives out.
We glued the 200-odd pieces using starch to ensure the card could still be recycled; sprayed it with fire retardent, and ta-da!."
Text and image from recyclenow, where you can register to win the tree! Found via materialicious.
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