The planners used the toy bricks to help people figure out how to run their health facility more efficiently, before construction, with real bricks, begins.
Smart. Lego is something accessible - you don't need to have a masters in engineering or city planning to see how blocks fit together to make a complex whole, and what that whole will look like.
As a citizen, you can more readily see how a given framework will impact you and offer comment based on that, not on dense reports full of jargon.
You can also test out more things in advance - is a space wheelchair accessible? Is a layout too confusing for easy navigation, requiring additional signage?
Empower people to be part of the process and you get better results.
Then everyone gets to say, we did build that.