I once tried to make a 4 wheeled Lego robot using a pivot arm suspension system. The robot was motorized using 2 Mindstorm (2.0) motors (one one each side). I can't find and original picture but it ...
(Partially inspired by this question.) I have been wondering recently just how many different LEGO bricks there are with studs on the side. Which LEGO bricks have studs specifically on the sides? ...