You've probably see all the videos about these strange shapes that won't roll themselves, but when placed between two flat surfaces, seem to roll like spheres. These bizarre shapes are called Solids of Constant Width.

I designed these solids of constant width to be easily printable, print quickly, and require no supports.

Settings:

• Turn on Adaptive Layer Height! This will reduce stair-stepping artifacts while keeping print time still reasonable
• The lower the layer height the better (0.1)

Assembly:

• Print 1 connector and 2 halves
• Slide the connector between the two halves and make sure that they are placed symmetrically and not rotated
• Add glue if necessary