LEGO Supplementaries were sets released during the early days of the LEGO system. These sets were designed to supplement and expand upon the building possibilities of existing LEGO sets. Instead of being complete stand-alone models or kits, Supplementaries provided additional bricks, special parts, wheels, windows, doors, gears, or even motors. These sets were especially useful during an era when LEGO's product line was simpler and less specialized than it is today.
1978 LEGO Sets
1978 was transformative: the modern minifigure arrived with articulated limbs and standardized proportions, becoming the heart of LEGO play. Three pillars launched in force—Town, Space, and Castle—bringing buses and services to city streets, astronauts and bases to the cosmos, and knights and keeps to medieval scenes.