Turning Sick Children Into Superheroes

And finally tonight, a young woman who found magic in a needle and thread. Here's neal karlinsky on a special mom who is america strong. Reporter: Don't let her smiling 5'3" exterior fool you. And... See More

And finally tonight, a young woman who found magic in a needle and thread. Here's neal karlinsky on a special mom who is america strong. Reporter: Don't let her smiling 5'3" exterior fool you. And never mind the fact that sow sewing is not exactly a super power. Robyn rosenberg has turned making a single child's cape, just for fun, into a movement. What does superman say? I was making them for my nephew, my son and my dog. It was just like an ah-ha moment of this little girl named brenna needed one. Reporter: Brenna was battling a rare skin disorder. So robyn sewed her a cape with a big yellow "b", and she loved it. Super brenna was born. Word caught on. Soon there was anthony in illinois, suffering heart and muscle problems who became schumer anthony. There was super mable, super andrew. In just six months, robyn sent 700 personalized capes to sick children in 45 states and 11 countries. Each one with a handwritten message, shipped by robyn -- super hero cape! Reporter: And opened like a gift on christmas morning. Meet 10-year-old super ke. Battling a severe gast gastrointestinal disorder. His mother says he never takes his cape off. He has taken the cape into his biopsy, to the emergency room. He showed other patients. It helps give him a sense of comfort. It makes me feel strong and brave. Reporter: Robyn now gets 10 to 20 requests a day. Thank you. Reporter: She's quit her job and has pulled in friends to help. If you would have told me six months ago that this would be my life, I would have -- I would have paid a million dollars to make this my life. But I wouldn't believe you. Reporter: Robyn rosenberger, unlikely caped crusader and america strong. Our thanks to neal karlinsky. Stay tuned to abc.Com also and