Tara Suri has recently launched TurnYouWorldAround.org and Aandolan.org (which means a movement for change in Hindi) is an organization that "implements social-change initiatives and provides youth with the tools to become changemakers." I don't want to spoil the surprise waiting for you if you explore the site for a few minutes.
TurnYouWorldAround - Aandolan's recent project is Connect a Kid, where youth can create projects to fund-raise for OLPC's Give Many program through their school, community, or just friends and family:
[Connect a Kid] is an initiative of Aandolan, an organization started by teens that provides youth with the tools to become change-makers. Having partnered with OLPC, [Connect a Kid] works to raise funds to purchase laptops, and also aims to raise awareness about the need for global education. Youth register --- and then work with friends and family to help kids around the world!
Disclosure: I work at Youth Service America, where Tara Suri is a member of the National Youth Council, a collection of amazing young people who make the likes of most of us tired with just seeing the amount of good they get done on a daily basis. She's a co-founder of HOPE (Helping Orphans Pursue Education) (when she was 13). She was also named Cosmo Girl of the year for 2007.