This is deceivingly hard 8 piece durable puzzle box designed to be difficult to solve and simple to print. Any rigid material should work. However 2, 5mmX1mm circular MAGNETS ARE NEEDED. Other than that and a little glue it's ready to use.
Solution Doc: https://docs.google.com/document/d/11TWn7Yn_QxWaf50aLglgGJPL3z8XK_9ROjsNNbvNaeA/edit?usp=sharing
Assembly Doc:
https://docs.google.com/document/d/13o3Hh5U_xB5pTbLi-vC5_sU6rIM-RR5X-aPmcLlhfmY/edit?usp=sharing
I printed all the small pieces (all but the shell and box) at .1mm layer height and the other 2 at .2mm for the sake of saving time and it worked great.
I also used PLA since nothing else harder to use is needed
The author hasn't provided the model origin yet.