Its a Crayon Sharpener for the larger Crayons not the smaller one although I would guess they can fit in there also.

Printed on MakerBot 2. Orient it correctly and no supports are required.

10% infill
2 shells
0.3 mm layer height

Uses a standard razor blade and a small screw (I used this one http://rtlfasteners.com/RC/d.html but any small #2 screw will work).

More picture on my blog:
http://www.3dprintmd.com/print/large-crayon-sharpener/