Lego design isn't my thing, but I stumbled on this channel (Brick Technology) this afternoon and... y'know, with the world always seeming to be falling (and pulling, and being pulled) apart, it's comforting sometimes to remember there are people who prefer to put things together instead.
So, I spent 15 minutes watching a guy filming his design process for building operational Lego brick engines running on compressed air -- up to a radial 12!
I saw that video too.
It was pretty awesome. Makes me realize how much my Lego game sucks.