Large pre-school set

The 13-2 large pre-school set was produced by Lego during the early 1970s as part of the company's broader expansion into early childhood developmental toys. During this era, Lego sought to bridge the gap between their standard building bricks and the needs of toddlers by introducing larger, chunkier elements that were easier for small hands to grasp and safer to prevent ingestion. These sets were designed to facilitate open-ended play, prioritizing foundational motor skills and color recognition over complex structural assembly.

The aesthetic of this series reflects the minimalist, primary-color design philosophy prevalent in mid-century Scandinavian educational toys. While specific lead designers are rarely credited in early archival documentation for these supplemental sets, the design language was heavily influenced by the ergonomic studies conducted at the time to maximize tactile engagement for children under the age of five. The set was received as a practical, durable addition to the household, eventually serving as a conceptual precursor to the more formalized Duplo system that would eventually define the company's pre-school market.