Ole Kirk Christiansen, a carpenter from Billund in Denmark started his business in 1932 with the goal of encouraging imaginative play and imagination in children. The company began by manufacturing stepladders. However the Great Depression forced him into an agile business model. He changed his focus to manufacturing toys, and in the process he created one of the most adored brands in history.
Christiansen was a forward-thinking man who was quick to adopt new materials and techniques. In 1947, he became the first company to purchase a plastics injection molding machine in the world. This significantly increased the capabilities and range of Lego products. The machine also let him test a design which would eventually become the iconic Lego brick. The bricks featured pegs on top and hollow bottoms that were interlocked with each other, allowing children to build intricate structures that were far more complex than the capabilities of the wooden blocks of earlier generations.
The 1950s were a period of growth for the company. Kjeld Kirk Christiansen, Godtfred Kirk Christian’s daughter was part of the management team and started modernizing the manufacturing processes of the company. This expansion included the launch of a line of dollhouses and furniture for girls as well as the first individual figures known as Minifigures. In 1979, the company widened its range of products to include sets with astronaut minifigures as well as rockets. They also introduced spaceships, lunar rovers and spaceships.
In 1990, the company launched three Model Team sets that were specifically designed for builders with advanced skills. These sets contained small pieces like axles, levers, gears, and other parts. They were the first Lego sets to provide an element of realism and accuracy.
https://lego-x.com/2020/02/22/a-brief-history-of-the-creation-of-the-lego-constructor/