Herb Williams makes amazing sculptures using Crayola crayons. Several of his sculptures are up for sale right now here on vivre.com (hat tip Luxist). Herb Williams describes in his bio how he gets colors from Crayola packed 3,000 crayons to a case.
I am the only individual in the world with an account with Crayola. I get these colors individually packed 3000 to a case. I cut down the sticks to the length I need by hand with either double guillotine cigar cutters or large breed dog nail clippers. I then bond the paper, not the wax, to a form I have carved or cast, completely enveloping the form. Lately I have been casting the completed crayon sculptures in a silicone jacket mold with a two-part epoxy resin and then painting the resin sculpture to look like the original, for a small edition. The sculptures beg to be touched, so when they are cast it makes the handling of them that much easier.
Check out some more of his amazing crayon sculptures here.