Below is the largest spaceship I have build to-date.  It weights nearly 25lbs.  I have some other spaceships next to it so you can visualize the size.    I enjoy building lego train's for the christmas season.  I already have the engine done...now for the rest :)  I received the first lego set many years ago from my parents...actually I still lived in germany.  I bought another one recently and also expanded the track.