As an aspiring architect slash developer slash dictator, I had a huge collection of LEGO blocks. (It was so huge, partly, because I had a severe issue with destroying things. I could never take apart what I had created. I'll leave that and my anal sorting of all the blocks by specific color and keeping them in separate shoe boxes to my psychologist.)
Thanks to Core77.com for introducing me to the LEGO Factory where you can design anything you dream up with the LEGO Digital Designer app and then order the blocks to actually build the thing.
There is a conceptual installation piece in this. A master-planned town rendered in LEGO blocks?! A pile of coke?!
The mind boggles.