Cardboard furniture building blocks

Bloxes, a US company is offering building blocks made from folded corrugated cardboard for building furniture. The blocks are about 200 mm cubes, but they are not simple boxes, but intricately folded origami like structures. The folds of cardboard reinforce the structure and proved locking between the blocks. These can then be used to build furniture. Exactly how useful this would be is questionable. You would end up using a lot of cardboard.