When I was about 10 years old, I made a huge Lego stadium. I'm not joking you either when I say that I even had advertisements. I remember it very well, I was bored one day so I just started building it. Before I new it I was huge and took up a big part of my living room. During the off-season I even used to change it into a hockey arena with a scoreboards hanging over center ice. It's too bad that it isn't assembled anymore, I would have taken pictures and posted them.