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.
1977 LEGO Sets
In 1977, LEGO expanded its product range with new sets that focused on city life, introducing models of houses, stores, and vehicles. This year also saw the introduction of the LEGO Expert Builder series, which laid the foundation for what would later become the LEGO Technic theme. These sets featured specialized elements such as beams, gears, axles, and connectors, allowing for more mechanically complex builds, including cars, airplanes, and construction equipment.