This is a variation of the classic game "Pin The Tail On The Donkey" In this game instead of trying to place the tail where they think it should be, the tail is already drawn on a piece of paper, players are then blindfolded, spun around and then have to walk to the piece of paper and draw the donkey, trying to get the tail in the right place. Give each player a different colour pen to draw their donkey with, after everyone has had their turn, whoever has drawn the donkey closest to the tail wins.
Source: From the original site.