D-Rain Tessa, 10, Amalia, 11, Shira, 9 and Rosa 7, presented their prototype to solve flooding in cities and re-use the water at the WeMakeThe.City festival. Called the D-RAIN, the children came up with the idea and prototype during the Global Children's Designathon. The prototype was further developed in collaboration with Rain-a-Way, now the city council in Amsterdam will see where it can be best put to use.