A crayon (pronounced /ˈkɹei.ən/)'s a stick of colored wax, charcoal, chalk, or other materials used for writing, coloring, and drawing. A crayon made of oiled chalk's called an oil pastel; when made of pigment with a dry binder, it's simply a pastel. A grease pencil or china marker (UK chinagraph pencil)'s made of colored hardened grease and's useful for marking on hard, glossy surfaces such as porcelain or glass. Wax crayons are commonly used for drawing and coloring by childre… (More on Crayons)