VIDEO: One of the key challenges in a hospital is good communication with patients, to ensure doctors can establish exactly what the problem is. But for very young patients, explaining exactly what hurts -- and what, or who, caused it -- can be fraught with difficulties. Now, drawing on established therapeutic methods, a French scheme is introducing a new weapon designed to help children tell adults about their symptoms -- using just a felt-tip pen...and a new kind of doll. Duration: 02:07