I've done both the ideas for projects. I did some googling and ... this idea was so much cooler than my wax hanging designs came out.
http://dannyseo.typepad.com/my_weblog/2008/08/new-crayons...
One idea that my neighbor did was, she used this as an item for a treat bag and made a colorful star shaped crayon, that wrote with multi-colors. I'm guessing she must have some kind of cupcake pan or something, shaped like stars. But here was the idea.... very cute, whatever the shape.
http://kiddley.com/2006/07/28/crayon-cookies/
Have fun!