I remember building lego cars which had a differential: http://groups.csail.mit.edu/drl/courses/cs54-2001s/images/legodiff.jpg http://groups.csail.mit.edu/drl/c

I remember building lego cars which had a differential: http://groups.csail.mit.edu/drl/courses/cs54-2001s/images/legodiff.jpg http://groups.csail.mit.edu/drl/courses/cs54-2001s/images/le...