The campaign looked at ten ways to free young people from war, disease, poverty, discrimination and abuse.
People were asked to vote for their top three choices.
Putting kids first
And now it's Nelson Mandela's job to present the results to world leaders at the UN Special Session on children.
He and many others want leaders to make children the most important thing on their agenda.
Check CBBC Newsround Online later to read Press Pack reports from some of the children at the conference