Book Sound Effects

For this to work, a small electronic card would come with most books. One would put this card into a small palm-pilot sized device, and clip it onto the back of their book. A very sensitive row of photocells would tell what page the person was on, by the thickness of the pages. A small camera would watch a person's eyes, and when they reached a word or phrase that required the sound effect, the sound effect would be played. The card would hold the different sound effects, and some information about the book (title, author, number of pages, etc.) A possibly more accurate way of the device knowing what page you are on is by punching the page number into it when you turn it on, and then it counts whenever you flip the page. It should also notice when you open the book and announce which page you were on. Headphones should be optional.