Playing with the Camera

I was trying to focus on a close up object so the lights would look all twinkly and out of focus in the background.  I think it is called Bokeh.

This is the same Christmas tree as the picture above but I stamped out a snowflake on black paper and placed it over my camera lens.  Cool, huh?  I don't quite know how it works, but all the Christmas tree lights are now shaped like snowflakes.