What the photo on the main page show is just a hand and a piece of paper, nothing else.
You might have seen a pen there too, but go back and take a closer look - it's actually a finger painted just like a pen! It looks so realistic, we were totally fooled at first glance.
It's a great optical illusion, and there are more. Check out the gallery below of Body Paint by artists Annie Rally and Annie Miller. They can do some amazing stuff just by painting hands!