After years of buying and building LEGO sets, my six-year-old son is tearing through the first level of the Master Builder Academy. He's fascinated by micro-building, and generally seems liberated after learning some of the fundamentals of LEGO design and building.
There are so many books and blogs, but many of them just show (fantastic) finished projects. I'm looking for the best published material (of any era), websites and individual blog posts that teach techniques and ways of thinking about building with LEGO -- that show and tell.