The internet is full of examples of regular pictures, edited in an image editing program, to become something funny, meaningful, or beautiful.  The site "Michael Buble being stalked by a Velociraptor" is a good example of this practice, as is this picture of President Bush eating a cat.

        

This video demonstrates the basics of this practice, using the free Aviary Phoenix image editor.

To access Phoenix, sign in to your Google Account.  In the Menu bar, select More, and then Aviary.

Make something awesome!