Hah, I made a stencil and painted it on with yellow acrylic paint. If you do this method I recommend using fabric paint! Acrylic tends to crack and bleed a lot easier, I got really lucky with how this turned out.
I used fabric bought from joannes, hah. The hood was a thick jersey knit, but the dress was made out of kiiiiiind of crappy material! I blindly sewed it by essentially tracing myself on to the fabric (awful idea, I do not suggest). I also suggest a stretchy fabric for the dress, because it will make it MUCH easier to get on and off.