Sam Taeguk Cube Unit | Flickr - No idea if this will work, but it would be pretty if it did. Twelve will make a cube with lots of holes in it, if the unit isn't too floppy. Which it certainly might be. Cardstock would seem to be indicated. A PDF.
Try It Today: DIY, 3D Art Ideas for Bold, Textured Walls! A bold rainbow-hued DIY 3D Geometric Paper Sculpture (or a subdued one, as in the one pictured via KNOT Magazine) spotted on MAKE:'s YouTube channel.