All over the world, children in hospital are being treated with a new kind of medicine: Laughter. LUCY is 23 and works for Theodora Children's Trust. She is one of many clown doctors who bring a smile to the faces of sick children

I'm a Theodora clown doctor, I call myself Dr LooLoo. I spend two days a week in Children's hospitals being extremely silly with my friend and colleague Dr Chequers. We make funny faces, tell jokes, and do magic tricks. As I walk into the woods  I blow bubbles, shake hands. with the kids, and make up nonsense  songs for those children well enough to sing. We take special balloons to make 'Ballon animals' and tell funny stories about them. We often meet kids who one week look really sick, then we go back the next week and they're racing about yelling "Hi There,Dr LooLoo! Hi Dr Chequers!