Hi Shapeways fans, Shift Happens is a meshing-gear puzzle in the same vein as Pentafold and Gear Fold. Bram Cohen wanted a set of six gears with an unequal number of teeth. After some discussion, he proposed the numbers 10-20-16-12-18-15. The initial idea was to have the gears in a triangle, but the gear set would not mesh that way. The alternative was a hexagonal pattern. As Pentafold and Gear Fold are rather floppy due to their hinges, Shift Happens uses a shifting mechanism similar to Gear Shift, but flat instead of spatial. Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Twisty Puzzles Forum. Check out the photos below. More photos here. Enjoy! Oskar