About LEGO Classic Supplemental
Supplemental sets are the parts packs of the 1960s, sold so that builders could add to a basic set the bits they needed most. They held windows and doors in frames, plates in several sizes, corner bricks, gates and fences, turntables, wheels with axles and train couplers. Many of these parts were new at the time, and the packs were often the first way to get them, like the wheels LEGO introduced in 1962.
1965 LEGO Sets
By 1965, LEGO employed more than 600 people as production scaled rapidly. Packaging was redesigned to feature only buildable models, improving clarity and consistency. In North America, Samsonite introduced the first LEGO gears—designed in Billund by Knud Møller Kristiansen—allowing mechanical motion and simple transmissions. Though initially exclusive to the U.S. and Canada, these parts marked LEGO’s first step toward functional construction.