Do you like a challenge when it comes to assembling flat-pack furniture? And we're not talking about deciphering the illustrations and hieroglyphs in an IKEA manual. We mean real Mensa-level stuff. If blank crossword puzzles and unsolved Sudoku grids get you really excited, you'll love the incredibly complicated furniture from Bulgaria's Praktrik.
One of its most challenging pieces is this coffee table/stool simply called the 4x6. Inspired by what's known as a Burr Puzzle, it comes as a collection of 24 pieces that requires a very specific methodology to assemble. Do it wrong, and you'll be spending hours on end trying to figure it out. But that's all part of the fun, right? And trust us, after spending almost $US575 on this piece, you'll be absolutely determined to solve it. [Praktrik via Wired]