Nine-year-old Ethan Bradley is hoping to finally be able to ride a bike this summer. Having been born with a heart defect so significant that doctors had not even expected him to survive his entry into the world, he has since received a life changing heart surgery that is allowing him to taste the joys of childhood. The extraordinarily complicated nature of his surgery was made possible in part by the surgeon's access to a 3D printed model of his heart that let him plan and innovate a way to address his unique situation. Read more at 3DPrint.com: http://3dprint.com/165917/3d-printed-heart-model-surgery/