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Snap cube, Kawai Joint, Interlocking, Math

Creation's quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.

3D model description

The snap cube is useful; the Kawai joint is mathematically appealing. I wondered, "Why not marry them in one design?" There you go: a 20mm^3 cube and Kawai joint (half a 20mm^3 cube) in one piece. They are designed to be fairly loose so children can assemble or disassemble them easily. There is a mirrored piece just in case you need some. A Kawai pair is also included to support more open-ended construction.

Obviously, the snap cubes allow rotation; the Kawai joints make rigid linear or perpendicular connections. Together, they support diverse constructions. Kids only know! So print a pile of them and leave them with some third or fourth graders and watch! Thanks for visiting.

3D printing settings






.1 to .2mm



Please adjust resolution if the pieces get too tight. I think they tend to be loose, though.

3D printer file information

  • 3D design format: STL Folder details Close
    • KawaiPair.stl
    • SnapCubeKawai20mm.stl
    • SnapCubeKawai20mm_Mirrored.stl

    Learn more about the formats

  • Publication date: 2017/12/26 at 19:06




STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.

When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides:


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