It is a crayon that can be used from age not have a pen. And a unique shape that has been developed from many years of research, a way that is hard to break, stain-resistant is the crayon features. I use safe material and to lick. Get the AP mark. Crayon itself washable, I removed with washing clothes also. In so there is a cavity hole to tip, stacking play can also be, and air goes through even if I swallowed. Yes case made ​​a little bigger size, I can happily practice of clean up. It is a 12-color set of basic colors.