A US boy who made history as the world's first child to have a double hand transplant is now swinging a baseball bat well. It is two years since Zion Harvey, who is now 10, was given new hands, and his doctors say they are amazed by and incredibly proud of his progress. <br/><br/>Dr Sandra Amaral, a member of the team at the Children's Hospital of Philadelphia said that Zion can now write and feed and dress himself, as well as grip a bat. Dr Amaral said, there was evidence that his brain had rewired to take account of his new hands. The team has published medical notes about his remarkable story in The Lancet Child and Adolescent Health journal.