Applying tilt shift to a picture.

Tilt–shift photography is the use of camera movements on small- and medium-format cameras, and sometimes specifically refers to the use of tilt for selective focus, often for simulating a miniature scene. Sometimes the term is used when the large depth of field is simulated with digital post-processing; the name may derive from the tilt–shift lens normally required when the effect is produced optically. http://en.wikipedia.org/wiki/Tilt%E2%80%93shift_photography 
I have always liked the effect for several uses.  My favorite might be a large scenery photograph centered on one point to make it look like a small scale.  I also like it in pictures of a subject to make the subject clear with everything else out of focus.  What I found is there are some wonderful filters online to do this.  
http://tiltshiftmaker.com/ is my favorite.  You upload your picture, play with the settings and download it out, for free.  Rather awesome really.  Here is a before and after of my daughter, it was a good picture to begin with (IMO) but I like the result as well.

Before
After