If the child has access to Lego Mindstorms, the attachment they design and build can even be as articulated as the prosthetic’s standard gripper—but movement isn’t essential to the usefulness of the IKO. Kids love Lego because it helps them realize whatever they can imagine, and even if the laser blaster they’ve attached to the end of the arm doesn’t fire, in a child’s mind they will still feel like a super hero.