Latch Hooked Yarn (12in x 12in). As promised, another yarn skull (though no one guessed it would be this!). I bought a pre-existing latch hook kit of a puppy and made my own pattern using the yarn colors provided. Since the color proportions weren't exactly the same I got a second kit to have the extra yarn. I made the pattern in Photoshop by reducing a photo I took to 40 x 40 pixels and then saving it as an 8-color gif (with manually adjusted the colors to reflect the existing yarn). I enlarged the result and printed it out and then used it to determine each strand as I went. The total production time was around 9 hours (which I believe makes it the most time consuming piece yet) and actually gave me a migraine headache near the end, which I had to sleep off before I could complete it!
UPDATE: Since Kim asked, here's a link to the 40 x 40 grid (enlarged) that I made for my pattern. Have fun and be sure to send a picture of anything you make with it.