Have you ever been about to finish a puzzle, when suddenly you realize there are more holes left than you have pieces? With [Nikolaos’s] 3D printed sliding puzzles, this will be a problem of the ...

Flow Free: Shapes is part of an ongoing series, which includes subtitles such as Bridges, Hexes and Warps. And as you might expect, the core conceit of this entry is that you're directing your flows ...