This is my hand and can you guess what’s missing? Some semi mount rings! I am just kidding about the hand (but I am serious with the rings)! This is a an optical illusion, if you might call it that, which is very easy to do. I am going to try this tomorrow and I am sure my daughter will be impressed. You can find the instructions on how to do this here. The website is in Bulgarian but my browser, Google Chrome, offered and conveniently translated it to English. However, there are images on how-to which are easy to understand. Enjoy!