A downtown Tokyo pencil maker offers a unique product. Clay made from sawdust. Working to find a way to make use of the waste generated in the pencil making process, current president, Sugimoto Ryuichi, developed the clay after years of trial and error. It feels just like ordinary clay, and the glue used as a binder is biodegradable, so it's eco-friendly. Better still, when it dries, it behaves just like wood. Child-safe, it's also popular with local childcare facilities.