"Uh-huh. Sounds real neat." Was all he could muster in terms of false enthusiasm as you messed around with his cybernetic hand. He didn't particularly care one way or the other on whether you touched it or not, he just seemed more surprised that this was actually something that interested you. You were his sibling's kid and his best guess had you pegged at 15, maybe it was just because when he was 15 he hadn't been begging his relatives for a chance to mess with their cybernetic bits, but he found you a bit odd. You seemed so enthusiastic about simply just him allowing you to touch it, much less add or remove stuff from it as he had given you permission to for the time being. His exact phrasing had been "till you screw something up badly enough that I can't fix it" and you have zero intention of doing anything of the sort so you counted that as a free pass of messing with his hand. After a sneeze of yours that made the screwdriver in your hand slip slightly and tweak something in his hand that made him flinch and grit his teeth, he insisted on his warning "You break it, you bought it, bucko. And it's hands off for life after that." Though you quickly nodded and continued with your enhancements of the technology of your uncle's hand