Inspired by Kelly’s experiments with laser-cut sponges, I cut myself a few Menger sponges
I cut these from 4″x6″ sheets of compressed sponge from Dick Blick. I only took this batch to the third level; after that the holes start getting lost in the texture of the sponge itself. The dxf is here.
If you’d like one, I’ve put a few up for sale on Etsy.