An Exquisite Corpse - this was our entry into a competition where teams of 3 have each person draw 1/3 of the picture, without knowing what the others are drawing.  I drew the head, progress images below.  

This is the final image.  We won this round of the contest - https://seattleartistleague.com/2017/04/06/exquisite-corpse-challenge-1-3-animal/