article_snippet.sent: Scroll down for video .
article_snippet.sent: The ingenious invention even runs on power generated by the swing of your foot as you walk. '
article_snippet.sent: I really feel that we have created something incredible.'
article_snippet.sent: One day I was walking down a road with a group of kids from an orphanage where I was staying. '
article_snippet.sent: Next to Mr Lee there was a girl in a white dress.
article_snippet.sent: As I looked down a girl in a white dress shoes were so small and as I looked around there were so many other kids with shoes that were too small for shoes.'