Building blocks are often kids' first introduction to architecture. But in the real world, triangles are the strongest and simplest shapes. That's why Tokyo architecture firm Kengo Kuma and Associates designed Tsumiki, a set of non-traditional building "blocks" that can create more intricate forms.
Each piece is a triangular wedge of cedar with notches so they can fit together to form structures that would less graceful with rectangular blocks, like arches and bridges. And they know a thing or two about elegance; Kengo Kuma and Associates is designing the Tokyo 2020 Olympic Stadium.
Tsumiki is in partnership with Japanese forest conservation group More Trees.