I made this mod because I didn't want to waste batteries. Light boxes for tracing can be over a hundred dollars. This one made by Crayola is twenty. Once you have all the materials you can build your mod in less than an hour. Parts list below.
Crayola Light-Up Tracing Pad (20.00 USD Walmart)
small drill bit
DC 4.5V 400mA power supply (30.00 USD Radio Shack) I had one from an old phone or something.
hot glue stick
hot glue gun