but craig kielburger discovered it early. seventh grade when the death of a boy changed his life. it was a change so profound that, through kielburger, it has now saved and transformed other lives all around the globe. in that moment, 19 years ago, craig kielburger was struck by a profound truth-- something as important as changing the world can't be left to grownups. >> craig kielburger: kids are looking to get involved. they're... they're searching for it. and in an era where, you know, adults often are looking for meaning and purpose in their lives, kids also want to assert who they are, not just by the video games they play or the peer groups they belong to, but by the contribution they make. and that's part of a youth self- identity in the world. and not only is it good for the child, my god, our world needs it. >> pelley: craig kielburger was a child when he noticed the needs of the world. as a 12-year-old in canada, he read about the murder of a boy his age in pakistan. iqbal masih was a slave in a carpet factory. masi