What they said. Very creative/silly and good for a first :D
However, you should remember to try to use larger bricks, like the 5x height bricks, when doing walls, instead of stacking up 1x heights, etc.
It's a little big, a lot of empty space up there. You might consider modifying the interior, giving it an extra floor or two, or more, depending how open you want them to feel.
Oh, and instead of making so many posts, you could upload the pictures to a site like
imageshack and put them all into a single post with the [img] tags.
For example: [img]http://img696.imageshack.us/img696/4107/blockland00002.png[/img]
