My daughter has a 'thing' for crayons and from what I can gather, the chunkier they are, the better. I first noticed her taking a nibble of one when she was quite small and managed to get all the bits out of her mouth. A few tiny pieces may not have been fortunate enough to ever see the light of day again...
Now that she is a good year older and about to turn 2 you would think that she would have outgrown this phase. Her crayon collection is slowly but surely getting smaller by the week and I am losing the will to keep on saying 'please don't eat the crayon, please take it out of your mouth'. I'll give her her dues though as when I say this she does lean forward and carefully, pushing out her lips, a stream of gob and crayon begins to dribble out of her mouth into my outreached hand. Before I was a Mum I would have found the thought of this quite disgusting but now, not much bothers me, luckily!
Hopefully in the next few months the idea of nibbling on a crayon will become boring and she will decide to eat her vegetables again instead.