What makes this unique is that it requires only four parts to build a 2x2x1 Rubik's style puzzle. No screws, pins, or caps necessary! Assembly requires a little ingenuity, but the Strong & Flexible material allows it to snap together. Don't try to disassemble it.

UPDATE: Version 3 corrects a cosmetic flaw that left visible gaps between the hollow pieces.

Video at http://www.youtube.com/watch?v=6D8cgcwJ_Bc

What makes this unique is that it requires only four parts to build a 2x2x1 Rubik's style puzzle. No screws, pins, or caps necessary! Assembly requires a little ingenuity, but the Strong & Flexible material allows it to snap together. Don't try to disassemble it!

Video of the hollow version at http://www.youtube.com/watch?v=6D8cgcwJ_Bc

Unique trisection of a sphere. The pieces are identical, but they fit together in only one orientation to form round marble-like sphere.

Two pieces must be ordered for a complete pendant.

Assemble two identical pieces to form this airy Twirlicue shape.  The pieces can join together to appear as one, but it's a challenge to figure out how to do it!

Run a silver chain, silk cord, or ordinary string through the holes to create a puzzling necklace!

These three unique pieces fit together to form a box, but it's a bit puzzling to fit them together because each piece seems to be both "inside" yet also "outside" of the other pieces. It can only be achieved by bending and deforming the pieces until they can be interlaced together. Bendy Boxy Burr is an unusual marriage of a traditional three-piece burr puzzle with a common form of six-piece burr.

Interior panels follow the typical scheme of a three-piece burr, except they exploit the flexibility of the material to eliminate the extended grooves typically required for a rigid burr. Puzzle builder George Miller previously demonstrated Three Card Burr which achieved a similarly unexpected result using specially-cut playing cards.

Exterior panels are arranged in a scheme much like a typical six-piece burr, except that their movement is restricted by their attachment to the inner panels so they can't be assembled in two independent groups-of-three like a traditional six-piece burr. But the flexibility of the material permits them to be tucked under and over each other. (The schematic arrangement was inspired by my previous Cuburr puzzle, an origami-like sheet puzzle.)

This toy has eight sets of built-in hinges so it can be folded through a series of square and rectangular shapes like a Yoshimoto Cube.

If you've got two copies of it, the tabs enable you to snap them together into a collection of eight small boxes that can fold harmoniously through all the same positions as a single model!

Watch the video for a demonstration!