puzzle is composed of
thirty identical components, which assemble and interlock. It is
extremely difficult to assemble. Each part is a kind of two-headed
snake. The above
version is made of laser-cut foam, and is surprisingly coherent. You
can throw it up in the air and catch it with no fear of it
disassembling. Its colors are random, fifteen of one color and fifteen
of another, with no pattern to the color arrangement.
My initial paper model of the form is shown below. The paper is floppy,
so I taped the parts together, but the other versions on this page hold
together just by the geometry of the nearly rigid parts.
Below is an elegant version made of black acrylic
plastic, 9 cm in diameter. It is
pretty, but acrylic is brittle and I broke a head off that you can see
at the lleft. (Don't worry, I'll glue it back on.)
Here is a version made of blue
vikureen plastic, which is less brittle, so safe to repeatedly assemble
And finally, for a sense of scale,
here's a self-portrait with the foam version:
Thank you George Miller
laser cutting of these.