Yes, you are right. It is a CD. This afternoon, I was alone in my apartment. My wife and baby had gone out and had not come back yet. So, I felt uninterestingly bored sitting in front of computer and checking emails and browsing photos in facebook. All of sudden, an idea popped out in my mind – what if I take some shots? Well, indoor photography is one of the coolest things to do. Then what? Grab a camera, a cd that was ready to be thrown in the trash, and a syringe to drip some water drops!!! Isn’t that cool?