Craig learned about a boy that was killed in Pakistan trying to stop child labor. After that he knew he had to something about it.
I also wanted to learn more about child labor because I didn't fully understand what it meant. I found out that child labor means "Child labour refers to the employment of children in any work that deprives children of their childhood"https://en.wikipedia.org/wiki/Child_labour
Why he went.
Craig found out that there were thousands of children that were kid napped or taken away from their homes and have been enslaved to work in hazardous materials, so he wanted to make a change. http://www.peaceheroes.com/CraigKielburger/craigkielburgerbio.htm