Millions of children across rural India still don’t have the habit of using soap while washing hands. They believe water is enough. Countless children succumb to diseases such as diarrhea owing to this neglect. Savlon, one of India’s popular health & hygiene brands, gave a simple solution that worked like a charm. Primary grade students in rural schools still use black-slate and chalk sticks to write with. So Savlon introduced special chalk sticks infused with soap. These could be used to write just like regular chalk sticks, but the chalk powder collected on kids’ hands while writing turned into cleansing soap when their hands came in contact with water. The simple innovation automatically turned washing hands with soap into a daily habit without requiring any extra effort from children.