This is truly one of the coolest things that I have ever seen!
I cannot imagine the amount of time and work that it took to get all the Adventure Time cast carved into these crayon in such amazing detail.
HQ Tran is the artist responsible for this wicked cool work. The artist apparently sells some of them on Etsy but you can just view photos on his blog.
There are lots of other characters on the blog, so you will be treated to lots of cool crayon carvings.