[header] How to make a lego stop motion [title] Keep the story simple. [step] The longer the story, the longer you will be taking images, so keep it very short to begin with. [substeps] For example, a short sketch could be about a mini-figure attacking or robbing another mini-figure and another one coming to the rescue. 
Or, it could be about one mini-figure pranking another. Or, have a bunch of mini-figures sitting around a table having coffee and talking about life.