I don't often talk about it, but I own a little house in Sydney bay. It's not much, but I'm proud of it. The problem is that it is only virtual and made out of Lego. This wonderful site allows you to design houses, or anything else, with virtual Lego on a virtual plot in Australia or New Zealand. It's like a simplified version of SketchUp, great for younger children.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
This is a superb resource for making 3D storyboards and animations. The programme is a little complicated and is designed to be used by older children. It feels similar to Google SketchUp and it will have your class enthralled for hours with creative writing and animating fun. A large download, but worth it.
http://ictmagic.wikispaces.com/Video%2C+animation%2C+film+%26+Webcams