I saw a post on Reddit years ago about an awesome puzzle by pacificpuzzleworks. The method of how it slides together intrigued me. I wanted model it in solidworks to make a 3d printed variant. Others have done 3d printed versions of this before, this is just my take at the model.
I have a few variations. One base model including the 3 parts. Then a model where the honeycomb is separated so you can print the honeycomb in a different color. I took the low tech approach on the one I printed. I printed in one color... then sharpied the honeycomb :)
I have included the file in STL, Solidworks, STEP, and Fusion360. Hack / Modify / Edit it to your heart's content.
You can print it all as one color, as three pieces different colors, or as pieces with multimaterial printing so the honeycomb is an accent color. This prints without support. I printed mine in SnoLabs Sublime Green-1.75-PLA+