This is a pretty self-explanatory picture; these are the tips of several Crayola crayons.
I've owned these crayons for a few years now, so as you can see, most of them have been used, while a few others are in brand new condition.
This picture was taken as part of an assignment on color for my photography class.
(May 23, 2007: Featured on the front page of Yahoo! Answers.)