The kindergarten students at one of my schools does an entire unit on Monsters.
For this lesson, I drew a bunch of monsters and then had a list of eyes, noses, face shapes, hairstyles, etc on the board.
The students could create their own monster portrait or copy one that they liked. The classroom teacher took it to a whole other level and had them write about them and do more portraits.
They did this in oil pastel.
Their classroom teacher took my white board scribbles and made her own monster parts menu and then the students drew more monsters and wrote information about them. So much fun to link art room and classroom lessons!