If you want to know more about human trafficking and children rights from others who are documenting these issues, this is the place to go. I will keep adding resources for you to see, read, and explore on this page. They will give you ideas about what you can do. They will also help you make more informed decisions about who you donate to, what you volunteer for, and help you see how trafficking/slavery is really a symptom of greater social ills.
The Trafficking in Persons Report 2015 gives you a glimpse into how widespread human trafficking actually is.
The United Nations Global Initiative to Fight Human Trafficking (UN.GIFT) promotes the global fight on human trafficking, on the basis of international agreements reached at the UN.
Matt Friedman is an activist who explains modern slavery perfectly in this video in just 16 minutes;
If you want to go deeper, then this video will give you more in depth knowledge;