This is one of the first 3D sketches I did as a freshman in college.  The sketch is of a project we had to do, where the idea was to design a symmetrical abstract model using small wooden cubes and rods, and to use your own design concepts.  The model had to be built on a 10″x10″ wooden plain and could be placed anywhere on that plain.  Everyone had different design patterns and layouts, and it was cool to see the outcome of each project idea in the end.