Jacek Walawender – formerly he was more into science and showing people how to make experiments from common objects and trashes. At 2014 he joined „Open Jazdow” – community of citizens and NGOs in wooden houses located in the center of Warsaw. Since then he began to turn more into social activities. He was coordinating Open Space for activities and made a lot of projects connecting neighbours, foundations, city and local communities to figuratively and literally build common spaces.