1. find an old canvas grocery bag not being used
2. freezer-paper stencil (plenty of tutorials out there) your wording with paint
3. cut them out and cut out timtex interfacing the same size (thicker than thick....try craft foam if you're not into locating it)
4. choose scraps of fabric big enough to cover the back and wrap around the edges
5. sew it on. leave your edges raw. come on just do it.
6. add a button hole in the corner
7. trim your threads better than i did