One of my students, Cameron Flint, spent part of the semester constructing a virtual tour of Leibniz’s Calculating Maching using software called Blender (his honors project for Calculus).
You can see his virtual rendering and animation of the functioning Calculating Machine on Cameron’s website Open Development. To be fair, Cameron says it’s not done yet … just a work in progress. But I thought it was quite good, and I wanted him to share what he has done so far with the rest of the mathematics community.