OpenSCAD Polyhedral Dice

And why does Thingiverse need another set of polyhedral dice? No particular reason. I got captivated by the problem of creating polyhedra in OpenSCAD using intersections of solids, so this particular set of modules is done that way, with the exception of the tetrahedron, for which intersections of other solids seems rather pointless (no pun intended. . . well, okay, maybe). Is there a reason to prefer this method over those using the polyhedron() statement with lists of points? Not really.