Here is a collection of
free do-it-yourself
instructions about making a light tent or box.
If you have written a guide yourself (or if you
know of tips and tricks not mentioned here), please
submit a new entry.
A light tent or light box for macro photography can be fairly expensive to purchase, but they are simple enough that they can be built easily at home with things you might already have lying around.
This light tent uses a cardboard box, and some white material (Tyvek) and allows you to take reasonable photos of products such as bottles, watches, jewlery, small objects, etc.