At photography club on Wednesday, we were given a presentation on how to make a do-it-yourself Macro light tent.  It was an excellent presentation and really interesting to learn how these can help you in your macro photography!  There are tons of tutorials online to show you how to make one of these yourself.  We just basically went and got what we thought we needed and it worked out great!  Here are the supplies we used:

White poster board (x2) - $1.65
Roll of white duct tape - $5.00
Dowels to frame it - $6.00
Pkg of tissue paper - $1.00

We cut the poster board into 3 pieces - all of them 15 inches x 15 inches.  We made a cube out of the dowels and they were glued together with carpenters glue.  The poster board was then taped to the frame on the top, bottom and back, leaving the front open.  Finally the tissue paper was taped to both sides (this allows light to be directed through).

Here is a photo of my daughter using the macro light tent to take photos of her littlest pet shops!