Open, close, repeat. One way it's a box and the other way it's a star. Then a box. Then a star. Repeat the repeat.

This hinged print-in-place model is a remix of the Fidget Cube. It 3D prints fully assembled, in one piece, folded up! A snub version is also included for those who like the old school fidget.

For the design geeks: Thanks to Greg Knapp, who used Blender to fold up the original Fidget Cube model and print it as a closed cube. His YouTube video inspired me to do the same thing in OpenSCAD code so that the Fidget Cube could be printed as a closed cube. The remix gave me the opportunity to make the snub side of the fidget a more interesting star shape.

For the math geeks: The "star" is a stellated rhombic dodecahedron, and this model makes up half of a Yoshimoto cube.

UPDATE: @David_Mussaffi made a great video of a Fidget Star 3D printing in the closed position, check it out! https://www.youtube.com/watch?v=GGq2zIDUaYg

UPDATE: @MosaicManufacturing has made a fantastic Multi-Color Fidget Star and printed it with their cool Palette color-enabling 3D printer attachment!

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*This design and all associated pictures and files are licensed under the Creative Commons Attribution Non-Commercial Share Alike license. If you want to use designs, images, or files outside of the terms of this license, please email

File descriptions:

• fidget_star_standing_15_48.stl and fidget_snub_standing_15_48.stl are medium-sized models that print standing up, unfolded. One is a stellated rhombic dodecahedron on the fun side, and the other is a cube with corners cut down.

• fidget_star_closed_15_48.stl and fidget_snub_closed_15_48.stl are like the above, but print closed up.

• fidget_star_standing_30_2_50.stl is a larger model with 30mm cubes, so a folded height of about 60mm and a standing height of about 120mm. It takes about 4-5 hours to print.

If you choose one of the "closed" designs then it will print folded up, with the cube side out. After printing you'll be able to open it up and see the star. If the closed version doesn't work on your printer, then try the "standing" assembly instead, which prints while folded open. If you need to make other adjustments to size or clearances, try the Customizer version.

If you want to print this model larger or smaller, then don't just scale up or down the model as a whole. Instead, use the Cusomizer to change the cube height, but preserve the hinge size.

I've found that a hinge clearance of .48 is optimal for MakerBot Replicator 3D printers. Other printers may need more or less hinge clearance. If your hinges are fused together, first make sure that you've turned supports OFF. After that you might try adjusting hinge clearance.

After printing, horizontal hinges will sometimes have some sag underneath; clipping this off before attempting to open the model will help increase your chances of success.