Sometimes a couple of kids can help change the world. Siblings Carter and Olivia Ries founded their nonprofit One More Generation (OMG) in 2009, when they were just 8 and 7 years old, out of a desire to protect the world’s endangered species. Their journey to heal the planet has taken them around the world, from assisting injured wildlife after the 2010 Deepwater Horizon oil-spill disaster to delivering thousands of handwritten letters to South Africa’s President Zuma, imploring him to do more to end rhino poaching.