When [Steve and] Joanie Wynn stumbled upon Roadmonkey Adventure Philanthropy, a fledgling business started by a former New York Times war correspondent, she thought, here's a chance to do something different - document six women volunteering at a school for AIDS orphans in Tanzania while also enjoying a trip abroad and scaling Mount Kilimanjaro. The experience was "life-changing." [The] couple returned with a lot more than a sense of adventure and some great footage; they discovered a new purpose and passion. They launched Journey for Good, a website that lists voluntourism opportunities in hopes of inspiring others to participate. Their documentary, "A Journey for Good: Tanzania," which aired on public TV stations around the country, garnered four Emmy nominations and two Telly Awards. Now they're in talks with KQED-TV to turn "Journeys for Good" into a series. The Wynns and their 9-year-old son, Ryan, ... left for Cambodia on Dec. 26 with Globe Aware to document their second voluntourism trip together. Their focus is not only on the projects, but also on the people who volunteer - what motivated them, how it changed them. "Our goal is to show people that this is a great way to travel differently," she says. "You can still go and experience a different culture, a different country and have an even richer and deeper experience by working side-by-side with local people." Voluntourism has been one of the fastest growing forms of travel, according to VolunTourism, which follows the industry.