The Bay Area Lego Users Group builds creations of every size and type imaginable, exclusively using Lego blocks. From entire neighborhoods of buildings, to a scale reproduction of the battleship Yamato, they had plenty on hand to show at Maker Faire Bay Area 2011. At their meetings they often have competitions to test their building prowess, in events such as coaster cars and structural stability on their very own “earthquake table.”

http://www.baylug.org/
http://makerfaire.com/pub/e/4916