Isaac from Yeovil has had more than his fair share of hospital visits in his life. He's only three but has been at the Bristol Children's Hospital for six months.
Issac's going home soon, but sadly there'll be others like him coming through the doors all too often in future. It's these children the Wallace & Gromit's Grand Appeal aims to help when all children's treatment moves under one roof.
The hospital looks after 100,000 patients every year. The expansion is costing the NHS £30 million and should be complete in 2014.