PAPER: I'm using 38.4cm x 26.4cm color-set paper. You don't need a paper that big, you can use a A4 sheet of copy paper. The grid will have a extra line (32 x 22.6 instead of 32 x 22), but you can cut it or simply mountain-fold it. Letter size can be used too.
Origami paper and copy paper or similar papers works well for this model
LIGHT: I'm using my smartphone with an app called DroidLight to turn the camera LED on. Probably a small LED attached to a coin battery would be more suitable