The LEGO DUPLO theme was introduced as far back as 1969 and is designed for children ages 1 to 5. It features DUPLO figures which are much larger than minifigures and DUPLO blocks which are about twice the length, width, and height of a standard System brick. Like LEGO System, DUPLO also has subthemes that are often junior versions of System themes, like Pirates and Castle and licensed themes like Disney and Super Heros.
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.