I’ve got to think about a project using vvvv. Had thought that it could be a 3D solar system, but I see it’s not very original and I can’t think of anything else. Besides, as a beginner, I can’t make complicated things… yet.
But in your case, i would suggest to go for something like Bullet or Box2d at first place. If you more interested in graphics then welcome to http://www.iquilezles.org/www/
@artie: do whatever you are interested in. actually there is no original or not original as long as the project keeps you motivated and you can learn stuff.
When i started I had a lot of little projects that had something to do with modding help files. try for example attractors or sphereharmonic…