Small puzzle box based on Kagen Sound's design (I think i figured out his mechanism, but it's hard to tell based on photos). See his site superlative puzzle craft and woodworking: [https://www.kagensound.com/Hexflex.html](https://www.kagensound.com/Hexflex.html)

Interior volume is 64mm x 28mm.

This design prints in place, but your printer (or your knife in post processing) must be able to handle narrow gaps. See the video for the trick.

[https://m.youtube.com/watch?v=dIz2TSrxC94](https://m.youtube.com/watch?v=dIz2TSrxC94)