Dodecahedron

This is 3D printed vertex joint that will allow you to build a Dodecahedron (12 sided polyhedron) with bamboo skewers.
https://en.wikipedia.org/wiki/Regular_dodecahedron

you will need to print 20 vertices
then cut 30 equal length pieces of bamboo from bamboo skewers.

The bamboo skewers that I used were approximately 3.2 mm but varied quite a bit. 1/8 inch wood dowels also work

Note: you may need to use a sharp exacto knife to whittle down the end of the skewer or dowel so that it fits into the join, Other times you may need to use some glue to keep the dowel from coming out of the printed joint.