Well, OK, just in theory. But this amazing NXT-controlled LEGO robot by Hknssn can build its own tower, and since the robot rides up the tower with each new piece it places, there’s theoretically no limit to how high it can build as long as it continues to be fed pieces.
As though making a very nice looking cutaway street scene with an underground Metro (subway for our US readers) train wasn’t enough, serial genius Esben Kolind has gone several better. His Metro train and station uses NXT, technic and a load of smarts to feature sliding doors which open when the train hits the station. But wait there’s more. Not content with just having the train doors open, the station doors open at the same time, preventing minifig suicide, and impressing the pants off onlookers. And to lift (excuse the pun) his game, Esben also adds a working elevator.