Oh okay. By the way you worded it it sounded like what did I think of the character idea. Well sure. I can't really think of any "tips" off of the top of my head. Is there a specific question you have?
I painted them on with a very small paintbrush. I suggest that you very lightly draw on the face with a pencil how you want the eyes to look and then paint over that. It saved me a lot of time once I started doing that.