This is about as easy as it gets, which is just my style!
Just get some styrofoam circles & glue black circles on them. Bam, your done! (cookie monster's in the house!)
I stuck push pins into the Styrofoam and stuck them on the wall. (I used the stick up kind of pin and put them in backwards so that the pointy part would go in the wall)
I totally tried to make them like Halloween eyes but I guess sweet and funny is more my style. They totally make me laugh, I have them peeking out everywhere.