Not just triangles - tetrahedra. If you want to get fancy and plan ahead, you can also go sort of Sierpinski on it...
http://web.archive.org/web/19991011135754/http://www.unl.edu/tcweb/Faculty/fowler/pictures/sierpinsk1.gif
I figure most marshmallows actually get eaten, but I wonder what percentage fall victim to non-consumption...




