I'm helping Matt Shaw from Sudley Juniors (great blog site, by the way) run an ICT Inset day this week and one of the bits I'm doing is on Google Sketchup. If you haven't come across this piece of software before, it's a 3D drawing tool allowing you to create objects such as a house and to rotate them so that the creator can view them from any point of view. The basic version is free to download and is more than adequate for use in primary school. What I've done here is collect a few Sketchup resources together as a starting point for those wishing to explore this neat tool.
Google's introductory set of training videos
A Moodle course aimed at Year9s but also useful for Sketchup newbies
A unit of study aimed at y5 and y6 from Redbridge primary ICT team