This is a dodecahedron made from 20 identical node parts and 30 toothpicks. There are slots in the node parts to allow adding sheets of paper to fill the facet faces. I made mine a 12 sided die but you could use it as a 12 picture picture frame. The node part is available as a OpenSCAD file.The PDF and Powerpoint (pptx) files contain the flate sides I used to fill in the facets on my model (I used card stock) I also included an STL file of a thin pentagon that could be used to fill in the flat sides (Dodecahedron Frame Side.stl)