We began by reading the story "Monsters Don't Eat Broccoli" by Barbara Jean Hicks. Then first grade drew a monster on construction paper in black oil pastel, leaving the face blank. Then gadgets were stamped randomly across the monster. A cityscape was then drawn for the background using oil pastel and painted with liquid watercolor.
Finally scrap black and white construction paper was used to create eyes and a mouth for the monster. The finished monster was cut out and glued to the front of the cityscape. Such a fun lesson and I love the unique character that each piece has.
My lesson plan is here. My instructional video is below.