LegoCAD! Now you don’t have to spend hundreds of hours trying to build your creations out of Legos, only to discover that you screwed up some place and have to start all over from the beginning. You can quickly work up your designs on the computer before ever clicking one block together. CAD a little to advanced for you? No problem! Start out with Ldraw!
Great, isn’t it? I wonder what my childhood would have been like with LegoCad, considering how obsessed I was with just the physical bricks…