Konstantin had this in a newletter a while back
A quick and easy light box
Items you'll need to make the quick and easy light box. Some of these items you'll already have around the house.
A child's plastic step stool -- you know the kind that has four legs and sort of reminds you of a very small table -- these are available at discount and even "dollar" stores.
A florescent "light stick" -- 18" long -- available at hardware and discount stores.
A 12" x 18" piece of 1/8" thick Plexiglas -- available at hardware and discount stores -- they'll usually cut it for you.
A 12" x 18" piece of clear but frosty self-adhesive shelf paper -- this is optional -- place it on the Plexiglas to diffuse the light when tracing.
I bought everything for about $10.
Now turn the step stool upside down -- with the legs sticking up -- place the "light stick" lengthwise between the legs. Place the Plexiglas on top.
That's all you need! An instant light box! And it's light weight! You can put the pieces in a tote bag or plastic bin and take it to workshops or classes.