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The Gambian team's robot, a cube-shaped device about the size of a large microwave, is designed to separate balls that represent water particles and balls that represent water contaminants and deliver them to different places. Fatoumata Ceesay of team Gambia displays her country's flag at the First Global Challenge. Fatoumata Ceesay of team Gambia displays her country's flag at the First Global Challenge. Gassama hopes she and Ceesay will inspire other Gambian girls to become interested in technology -- and look for solutions to some of Gambia's problems such as getting access to clean water for everyone.