I heard about someone once , that took small sheets of white acid free paper and many colored pens. She had figured a layout , with background color to match each characters color. So she brought the corresponding pen colors for the character to use to sign the autograph on the white paper. She had the charater sign the white paper, with the perfect color pen, then used the same color backgound paper as a frame for the autograph and the picture of the character with her child.