Please come and watch the puzzle prototypes that I have designed and built, like my Guinness World Record 17x17x17 "Rubik's" Cube or the Gear Cube. And try to answer the questions that I post at the end of each video.
These twisty puzzles have holes. Inspired by Okamoto's Void Cube, a Rubik's Cube that is hollow inside, several more hollow twisty puzzles were developed. All designed by Oskar van Deventer.
These so-called "Turkish puzzle rings" are multiple-band rings that are linked together. Once scrambled, it is quite a puzzle to get the ring back together again. These are modern puzzle ring designs by Bram Cohen and prototyped by Oskar van Deventer.
These are puzzling objects that are not puzzles. Some are mathematical patterns, some look like a magic trick and some feature interesting mechanisms. All designed by Oskar van Deventer.