This was an awesome couples contest that won us $200! We bought furry fabric and folded it in half longways. We sewed the bottom parts on each side but left room for our arms. We cut out the hole for the mouth and sewed black mesh there. We sewed a small tube type thing on the edge of the hole and stuffed it with stuffing to make subtle lips.
We made eyeballs out of Styrofoam balls and antennas out of wire hangers. We attached the top of the costume to baseball caps to keep it secured on our heads. We made arms out of wood dowels that we covered with fur and had our own Earth Book.