Lisa Kristine inspires the world with her photography of people living in ancient and often horrific circumstances; much of her work focuses on vividly documenting slavery. In early 2012, 8-year-old Vivienne Harr saw a photo Kristine had taken of two slave children with rocks strapped to their heads, holding hands as they struggled under the weight of their backbreaking work. Vivienne was stunned to learn that nearly 30 million people are still held as slaves today and she decided to do something about it.

With the help of her father, Eric Harr, Vivienne launched a campaign to raise money to fight child slavery. Starting with a lemonade stand, her efforts grew into a social enterprise with a remarkable 5 percent of revenue going the fight. Make-a-Stand Lemonade is now available in stores.