There's very few blogs I follow but one of them had the cheapest way to make a light box using a piece of plexiglass from a hardware store, a tap light and a disposable foil roasting pan! ... here's the link ...
http://sewmanyways.blogspot.com/sear...el/light%20box
just in case it get's filtered out just google - sew many ways
then scroll down to where the labels are on the right and look for "light box" - the labels are in alphabetical order!
What is AOTH?