A changeable 6-spoke pyramid pass-through twisty puzzle fidget toy, made famous on TikTok, including the OpenSCAD 3D model file used to create it.  I was driven to create this model because everything that I'd found on the 'Net did not print well in a tiny size.  This version is 65 mm tall (i.e., 2.5 inches) and makes a great party favor.

On both my Prusa MK4 and Original XL, with input shaping enabled, it prints in about 100 minutes using 0.2 mm layers in generic PLA.  You can print it “nested” or as two separated nesting objects.

Pay attention to these OpenSCAD parameters:

spokes=6;      // no. spokes in twisty part
height=65;     // overall height in mm
protrude=0.2;  // fraction to extend tip past outer block
tol=.05;       // controls looseness of fit

I've changed the “spokes” parameter from 6 to 4 and printed versions with 4 “lobes” instead of six.  In that case it is no longer is a “puzzle” in that it always nests perfectly. 

Enjoy!