-18" by 3" cardboard
1) Fold the cardboard in have so its 9" by 3"
2) cut a hole in the cardboard the size of your google eye
3) draw a monster or what ever you want and you can even do 2 eyes if you want to on the inside of the card and write a note if you want
4) cut out a little red heart and glue it onto the outside of the card near the eye/eyes
5) write you and your done