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.
1980 LEGO Sets
In 1980, LEGO introduced the LEGO Train theme, building upon previous train sets but now incorporating 12-volt systems for electrification. The year also marked the debut of the LEGO Classic Space theme, adding a new dimension to LEGO's portfolio with sets that focused on futuristic and extraterrestrial exploration. Additionally, the Technic line, which emphasized more advanced building techniques with specialized parts, continued its growth.