The project Hanging Garden Oberlaa is one of the first of several school projects in Austria installing green walls to bring children closer to nature. Pupils of the elementary school Oberlaa plant a 5sqm, free-standing wall construction with herbs. The children themselves sow herbs and they were involved in the implementation right from the start. They learn how to grow, nurture and harvest plants as well as how seasons and weather conditions affect the vegetation. In addition to a lot of fun, an exciting change in everyday school life and a lesson in organic farming, it is a nice experience for children to be able to literally reap the rewards of their own work. Through this project pupils learn the proven values of Smart Cities such as climate protection and energy efficiency. The Styrian chocolate manufacturer Zotter supported the project with a special idea – from the mint, which is harvested by the students of the elementary school in Oberlaa, the company produce a mint-chocolate called “Smart City – Hanging Gardens”. Every supporter who contributes more than 20€ receive subsequently a small bar of that special edition. The project was fully financed through donations and communicated through a crowdfunding-campaign. There were many private, but also public contributors: the football club Rapid Wien backed the project and from the political side Vice Mayor Maria Vassilakou, Executive City Councillor Sandra Frauenberger and the District Council of the 10th district belonged to the endorsers. Renowned companies such as Wiener Stadtwerke, Hutchinson Drei, Kelag, APG and last but not least Pöyry themselves generously supported the project. The company Tech Metall, which was responsible for the construction, donated time, material and expertise.