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.
1976 LEGO Sets
In 1976, LEGO released several new sets and themes, including the LEGO Police theme, which introduced models of police cars, motorcycles, and police stations. 1976 was also the year that LEGO introduced the LEGO Basic Building Set, which included a selection of basic bricks in various colors and shapes, as well as instruction booklets with ideas for building projects. Other notable sets and themes released by LEGO in 1976 included the LEGO Space theme, which expanded upon the Space sets released in previous years, and the LEGO Trains theme, which introduced new electric train models.