Primo is a subtheme of Service Packs that consists of 3 sets that ran from 1996 to 1999. As of today, the average annual growth of sets in Service Packs Primo is approximately 3.2% per year.
The LEGO Service Packs for the Primo theme provided additional pieces and accessories to enhance the main Primo sets, which were aimed at very young children and produced from 1995 to 1999. Primo sets featured large, rounded pieces that were safe for toddlers, including basic bricks, figures, and interactive elements like rattles and wheels.