A Little Fun...

Sometimes, we need a little break from our research...
I ran across this little Geometry "game" about building three-dimensional houses: MathsNet Building Houses 3d Game. More tools (including the game) to help visualize solid 3D geometric structures are available here: http://mathsnet.net/geometry/solid/. Maybe some of your students would find this website helpful and perhaps a little fun at the same time.