Signed or not, super cute print! Thick, good quality paper and the print is crisp and clear. I was sooo impressed by the packaging! I figured it would come rolled up or something like a poster, but no! It arrived in a thick envelope within a large box to with two other books I ordered. Lots of paper separating them so they arrived in perfect condition. Sooo well packaged and I'm so grateful. This is going to be displayed in my daughter's playroom and I'm so happy she has a great Mexican American scientist to look up to.