Computers

This program is handy for creating 3D models of buildings and such on your computer - however it was the ability to add custom photos onto the side of objects, or to use a building of a photo to help create the 3D model, that I was most impressed with.

http://sketchup.google.com/

some "How To" videos here:

http://www.youtube.com/profile_videos?user=aidanchopra&p=r&page=1