These drawings are on tissue paper. I used Elmer's glue stick to glue a beige tissue paper on top of an encyclopedia page. The tissue paper came when my anniversary flowers were delivered (the tissue paper kept the vase from shaking around in the box it was held in).
I sketched from posemanics.com with a felt tip marker but the Elmer's glue served as a resist so it didn't go on very well. I used black marker and gray marker for the shading but you can't really tell.
I used children's watercolor to color around the figures, it drys very chalky looking and it's a different color when it is wet.