We used cardboard (black posterboard would also work) to make 4 squares, one for each square in the window. Cut them to fit snugly. Then using a box cutter, cut out the face in each square. Then tape orange tissue paper over the cut-outs. Put in window.
We did cut up some black construction paper to cover up some of the sides where the cardboard didn't fit perfectly. And in the mouth area, it looks like two mouths instead of one. Another boo-boo.
We all really like it and I love the fact that we made something so cool without having to go to the store and spend any money.
Love it, love it!