Calvin's Puzzle Carl's Bubbloid 5x5x4 Blue

Carl’s Bubbloid 5x5x4 is a unique and rare custom puzzle designed by the renowned puzzle designer Carl Hoff. This cuboid combines an irregular 5x5x4 structure with rounded and smooth edges, creating the characteristic "bubbloid" shape. With its asymmetrical layer design and combination of different layer widths, it adds an extra challenge where both layer rotation and shape-shifting play a central role in solving. The rounded edges make the puzzle comfortable to handle, while the visual design makes it a striking gem in any collection. Carl’s Bubbloid 5x5x4 is a perfect blend of creative engineering and technical challenge, appealing to collectors and twisty puzzle enthusiasts who love unique and challenging designs.