Demo Party is an eTwinning project aimed at secondary school students (aged 15-18). The aim of the project is to bring students together so that they can practise their communication and ICT skills and learn about democratic participation. The project will be divided into challenges called School Demo, Art Demo, Technology Demo, Science Demo, Literature Demo and Nature Demo. The climax of our Demo Party will take place in April (Nature Demo) when we will be celebrating the 50th anniversary of Earth Day. Thus, April will be devoted to the following four SDGs: Responsible Consumption, Climate Action, Life Below Water and Life on Land. We hope that when working together on the suggested tasks our students will create an international democratic community of open-minded European citizens.