I created this shirt for our school's celebration of Pi Day. Since I teach ESL I wanted something that tied in with my department and so came up with the idea of pi linguistics. There is a small "pocket emblem" for the front and a large picture / text for the back. Both will print backwards on the paper. Print them on iron-on transfer paper from your regular printer, iron, peel, and enjoy. I do this quite a bit to make custom shirts for various things at school and the kids always love them. Sometimes I use a Sharpie or paint marker to darken the colors up a bit but generally if I follow the directions that come in the iron-on transfer paper package I don't have a problem.