Most of what I found seemed a bit too intensive for what I wanted, and then I found this tutorial http://www.studiolighting.net/homemade-light-box-for-product-photography/ and ran with it.
I used a presentation foam core board (the kind you use for science fairs) so I didn’t have to do all that taping. I added two pieces of poster board. One for a ‘floor’ and one to hide the seam where the foam core meets the ‘floor’. Just use some poster putty to tack it up (if you look closely you can see the shadow of the putty at the top of the poster board in three spots) tape the other end to the ‘floor’ piece, so it curves. I don’t need a top.
The shop lights were $6.08 apiece at Home Depot (I only used two because the house is very bright. I was only looking for a little added light to deal with the shadows)
I used GE Reveal bulbs. (But I’m thinking of trying the Daylight bulbs suggested in the tutorial.)
It’s easy to set up and break down and it’s easy to store, just slide it into a closet and clip the lights on a shelf.
Thank you, Studio Lighting.net!
And here are a few shots using the light box.