Nobel Peace Prize winner Malala Yousafzai has urged wealthy countries do more to help desperate Syrian war refugees, calling them "quite stingy."

Malala, who campaigns for education rights for children, spoke Monday during a tour of Jordan's Azraq refugee camp. She was accompanied by 17-year-old camp resident Mezon al-Melihan, a fellow education activist.

Since the 2011 outbreak of the Syria conflict, more than 4 million Syrians have fled the country, most settling in neighboring countries like Jordan. Aid agencies asked for $4.5 billion for 2015 to help refugees, many of them struggling for survival, but have received only a fraction.

Malala, who turned 18 on Sunday, called on the world to increase aid.

The Pakistani teen was shot by the Taliban in 2012 for asserting her right to an education.