Now that 3D printing has dropped so considerably over the past couple years, more and more nerds and engineers are affordably creating products that would cost tens of thousands of dollars just a few years ago. For children missing a hand or arm, a prosthetic was especially expensive because they would often outgrow the device in a short time. But using new technology, Stephen Davies helped build Isabella a prosthetic arm that not only was cost-effective, but allowed her to easily grab things. And it’s super cute!