Gelsenkirchen, Germany, Summer 2013 – At a local playground in Gelsenkirchen, a group of 15 children from ages 7 to 12 years carried out a number of physical experiments under the supervision of an adult physics specialist. This is where the Masterflex spiral hoses came into use as a rollercoaster and marble run.
The organizer of the successful “Environmental Diploma for Children” series is the city of Gelsenkirchen in Germany.