Building Bigger Thinking is a subtheme of Classic that was introduced in 2018 and currently consists of 5 sets. As of today, the average annual growth of all the sets in Classic Building Bigger Thinking is around 4.0% per year.
The LEGO Group celebrated their 60th anniversary of its iconic plastic brick in 2018 by releasing a new theme called Building Bigger Thinking, which features five sets paying tribute to classic LEGO themes of old such as Space, Castle, Pirates, and Town. Each set included a 60 year printed 2×4 tile to signify the 60th anniversary of the brick.