For a while now, I've been using a lightbox made from a pizza box, duct tape, and poster paper.
It finally bit the dust, and I needed to make a new one - not only that, but I wanted to make it collapsible. In my tiny apartment at school, having a big bulky lightbox takes up too much room.
I saw in the etsy forums, someone mentioned using PVC pipe to make a lightbox. Sounded like a great idea to me, so off to the hardware store I went.
$15 later (and slightly sore arms from sawing the pieces to the right length) I have exactly what I need, along with a few different backdrops. I glued clips onto one post in order to hold the poster paper in place.
Still need a sheet to cover it, hoping to find an old one around the house to cut to the right size.
Next project - sewing a bag to keep all the pieces in :)