Just like any 13-year-old, England's Tilly Lockey loves to do makeup. But unlike most 13-year-olds, she does it using her 3D-printed bionic arms. It all started about the time Tilly was learning to walk, when she developed a rash on her body, and was taken to the emergency room. She ended up having 10 blood transfusions, and had both of her hands amputated. She lived without hands for a while, but eventually got a pair of myoelectric arms thanks to technology company Openbionics, which are the first medically approved 3D-printed prosthetics. Now she’s able to do many things she couldn’t before, and she also works with the company on making the arms more efficient for practical use.