This is an openscad project so you can easily customize it to your needs.
The included stl file has following dimensions (base-width, height): 70x100mm
It has holes in the middle of each edge of base and at the top so you can use a piece of string to explain cross sections in a pyramid.
Remember to come back and post what you've printed as Make.
It's good for the designer and the community (that means you)!
To post a Make, come back to this Thing and click Post a Make.
Or, you can use the Thingiverse Mobile app found on
and the Apple App Store.