
Supplementary is a subtheme of Duplo that consists of 6 sets that ran from 1982 to 1994. Most sets were released in 1987 which accounted for 2 sets. As of today, the average annual growth of sets in Duplo Supplementary is approximately 2.4% per year.
LEGO Duplo Supplementary sets are additional sets of bricks and pieces designed to complement existing LEGO Duplo sets. These sets often include specialized pieces like windows, doors, and unique characters or accessories, expanding the creative possibilities for young builders and encouraging imaginative play.