Here we see a fascinating diagram for a LEGO brick, as imagined in 1939 by G.K. Christiansen. These blocks are of the sloped variety, so we can see that more complexity is being introduced to the basic idea of building blocks. With each new iteration, more design and more buildings are possible. In this fashion, design begets creativity, which fuels the designs of the next generation. Cross-sections of the blocks show that though they may be toys, the bricks mimic the principals of real architecture.