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.
1962 LEGO Sets
In 1962, LEGO introduced one of its most important innovations—the wheel. This addition transformed LEGO from a static building toy into a dynamic system of movement. The first wheel sets (400 and 401) featured plastic hubs with rubber tires, enabling realistic vehicles and construction models. The company also expanded globally into Asia, Africa, and Australia, and established a process development lab in Billund that pioneered the switch to ABS plastic, which became standard the following year.