1. Begin with a cube.
2. Shrink the cube to 1 / 3 of its original size and make 20 copies of it.
3. Place the copies so they will form a new cube of the same size as the original one but lacking the centerparts, (next image).
4. Repeat the process from step 2 for each of the remaining smaller cubes.
After an infinite number of iterations, a Menger sponge will remain.
from Wikipedia
The Menger Sponge is a fractal particularly appealing to modular origamists, for two reasons: it can be made out of Sonobe modules (the very first “brick” that every origamist learns), and given its fractal nature, it can be expanded forever and ever. What follows is a list of origami websites on this fascinating structure: Continue reading Origami Menger Sponges
When I first wrote an 
If I were to describe this book in as few words as possible, I would choose these: easy, modular, organic origami. Easy, because the folding instructions are very clear and each of the pieces can be made in a few minutes by people with none to very little knowledge in origami; modular, because you create the models by assembling several small identical units together; and organic, because the result is a whole which looks much more complex than the sum of its parts: actually, many of the spiky stars and rings remind me of living sea stars and urchins. I came to this book after having seen several models a friend of mine had done, and I recommend it to anyone interested in any of the key themes mentioned above, as it will be a pleasing and rewarding discovery.