In August of the same year Auma took the challenge to get over 100,000 postcards from children in the Guinness World Records 100,000 post card challenge. The project was initiated by the Swiss Agency for Development and she felt the need to help raise voices of children and youth from the global south that have been heavily underrepresented so political leaders could take urgent action to fight climate change. Through the GAP, Auma worked with young people from ten countries including Uganda, Nigeria, Kenya, Libya, Lebanon, Nepal and Bangladesh going to schools to get children's opinions what climate action means to them. The Swiss project ended up mobilizing over 125,000 post cards in total which were displayed on the Aletsch Glacier. Her participation in this advocacy campaign propelled her to the global stage where she attended the 2018 United Nations Climate Change Conference (COP24) conference in Poland.