here. want to have a look? sure. ready? yep. great. each one looks the same. actually, i think yours might be better than mine. what do you say we, we both try them on. do a progress report. okay. bill: nice. 7-year-old alex was born with a partially developed arm. he knew he would be meeting with some kind of expert but had no idea it would be one of his favorite superhero characters, the avenger himself, live and in person. downey showing up in character as inventer tony stark the alter ego of iron man. the 3d robotic arm was given to alex at no cost to his family thanks to a charity called limitless solutions. downey said giving arm to alex was, quote an absolute privilege. he looks great with it. martha: watch the whole thing. the little boy, do you know who that is? we showed it in the tease.