Of course, theory is important. But just think about the Lego manuals, they aren’t telling you things like, “Let’s interlock the elements via clutch power”—which is just their very complex (though technical!) way of saying, “We’re clicking the bumps on one Lego piece into the holes on another until it clicks.” In fact, they hardly tell you anything at all; they simply show you. And that’s what we’re doing here.