About this 3D model

Skull and Crobssbones designed by one of my geometry students in openSCAD. In my high school geometry class we used openSCAD and the MakerBot as a way to introduce the z-axis; learn a little code; and review the concepts of intersection, union, and rigid transformations. We spent 2 class periods learning openSCAD and I gave them 2 weeks outside of class to create their object.