I do autographs all the time and I'm 42. There is nothing wrong with it but there is some characters that don't sign book. Like Sulley,Russell,Koda,Kenia, there is more that I can't think of right now. But like I said I do it all the time. Oh even the Peguins from Mary Poppins sign and that is the only way you will know the Peguins names is to have them autograph your book.