lightbox tutorial?

[http://users.livejournal.com/_lemeurtre_/]

I'm looking for a tutorial on how to make what I *think* is called a lightbox. Not the thing you use to photograph things in good light, but a decorative box with a light inside and artowrk on one or more sides, backlit by the light. Does anyone know what I'm talking about, or know of any tutorials on how to make one? Sorry for the vague description, and thank you!