1) I learned that this effect is called Pixilation. Wikipedia defines it like this- Pixilation (from pixilated) is a stop motion technique where live actors are used as a frame-by-frame subject in an animated film, by repeatedly posing while one or more frame is taken and changing pose slightly before the next frame or frames.
2) The white circles that are hanging in front of the brick are from the whole punched pieces of Vivi Dot packaging. I use a round scalloped punch for the packaging of my watch necklaces and I could never bring myself to throw the punched peice away. I'm so glad I didn't because I was able to sew them all together to add a little bit of three dimensional detail to the brick wall.
Hope you enjoy this little glimpse into our party!