@Hikaru Ichijyo: Nice assortment of DC ladies. Vixen's costume is probably inspired by the outfit she wore on the old JLU cartoon.
I ran across this yesterday, and it looked interesting, so, I figured I'd purchase it and give it a try. It's from 1999 and the creation of the semi-famous artist/engineer/inventor
Chuck Hoberman who's well known for his folding toys/structures. Even if you've never seen one of these Expandagon building sets, chances are good that you've encountered one of his expanding sphere toys (I can remember that one of my nieces got one as a Christmas gift years ago).
These are the basic building elements (Expanda-Square, Expanda-Triangle, and X-Linkage) shown contracted (left) and expanded (right). There are also a slew of tiny connector bits, and some pieces that lock an expanded structure into place, but you can build a lot of the stuff without them.
Cuboctahedron model contracted (left) and expanded (right).
Rocket model contracted (left) and expanded (right).
Expandagon won't be unseating LEGO anytime soon, but I had fun messing around with it. The pieces are better suited to making polyhedrons and mechancial objects, as the few examples of organic ones, like people or animals, pictured in the instruction manuals, ended up looking way too abstract in my opinion.