If you find jigsaw puzzle assembly process to be too rigid, Nervous System’s Infinite Galaxy puzzle could be right up your alley. Either that, or it will throw you into a fit of rage.
Each side of the 133-piece, birch plywood puzzle boasts an image of the galactic center taken by the Hubble telescope. It can be assembled any way you want—there’s no starting point and no edges. Indeed, there’s no right or wrong method of putting it together.
Topologically, the Infinite Galaxy puzzle maps to a Klein bottle, an impossible 3D shape where the inside and outside are mathematically indistinguishable. What this means is that the puzzle tiles with a flip. Pieces from the right side attach to the left side but only after flipping over. Just like the Klein bottle’s surface has no inside or outside, the puzzle has no up or down side. You can start the puzzle anywhere on any side, making it extra challenging.
If all of this sounds confusing, you can get a visual reference by checking out the video below.
Infinite Galaxy Puzzle ($100)