Basic Sets or Universal sets were part of the LEGO Basic theme, which began in the 1970s, was designed to be a more general, non-thematic series of sets. Unlike the themed sets that revolve around specific stories, characters, or concepts (e.g., space, city, or pirates), the Basic theme provided a collection of standard LEGO bricks and pieces, often in a variety of colors. The goal was to encourage free building and creativity without the confines of a specific theme or narrative.
1983 LEGO Sets
In 1983, LEGO released the LEGO Castle theme, which transported builders to medieval times with knights, castles, and dragons. This theme's emergence allowed children to delve into historical and fantasy-based narratives, building and role-playing epic battles and legendary tales. Additionally, the Duplo line, aimed at younger children, was further enriched.