The LEGO Duplo PreSchool theme, active in the early 1970s, was among the first Duplo lines designed for younger children. Key sets in this theme include "LEGOVille" (082), which featured a variety of buildings, vehicles, and figures to create a small town setting; "PreSchool Set" (78 and 75), which included basic building elements and figures to encourage creative play and learning; and "Train Station" (081), which provided a simple train station setup with a train, track, and station elements. These sets focused on developing fine motor skills and imaginative play in preschool-aged children.
1975 LEGO Sets
In 1975, LEGO continued to release a wide range of new sets and themes, including the LEGO Land Busters theme, which featured models of construction vehicles such as bulldozers and excavators. 1975 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 1975 included the LEGO Space theme, which introduced new spaceship models and minifigures, and the LEGO Castle theme, which expanded upon the castle sets released in previous years.