Here is a simple photography light box that was constructed out of foam core board. The frame was cut out using a rotary cutter:

The foam core was then assembled using a hot glue gun:

The holes in the box were covered using parchment paper. The paper was pinned to the box instead of glued so it can be replaced if it turns yellow over time. A set of three 100 watt incandescent light bulbs were used. One bulb was placed in a desk lamp above the box. The other two were attached to some simple 2×4 frames on the right and left of the box. Here are some action shots:

Here are some resulting photos: