Nate, left, and Murphy Miller, outside their PickerUp stand at Southern Soul BBQ recently. Nate and Murphy are raising money to bring clean drinking water to children in Africa.

Anne-Murphy Miller, who goes by Murphy, and her younger brother, Nate, both students at Holy Trinity Classical Christian School, in Beaufort, S.C., were on a visit to St. Simons Island, when they were invited o set up their Murphy’s PuckerUp LemonAid stand at Southern Soul Barbecue during a recent Saturday brunch. Athens-based Chef Hugh Acheson was delighting the crowd with his culinary creations, and the Miller children were on a mission to sell their drink to as many people as possible.

A couple of years ago, the Miller family had an idea to help get clean water to people who needed it, and their LemonAid cart became their fundraising vehicle, and a way to carry out their mission: To provide schools in developing nations with water filtration systems that are sustainable, simple and effective to help protect students and staff from waterborne illnesses.

Murphy heard about the shortage of safe water when the Rev. John Daau, of Good Shepherd Academy, in Juba, South Sudan, visited her school. She and her mother, Jodie Miller, then went to work researching how to provide clean water to Daau’s school. They found the Vestergaard LifeStraw Co., which was already providing clean water to places in Africa, and contacted them to get information about the price of a purifier, whether it could be installed in Juba and the price of the installation. One system provides clean water for 3-5 years for more than 500 people.