It is a project that focuses on United Nations' 2030 Agenda - SDG11 on "Sustainable Cities and Communities". It is expected that by 2050, more than half of the world's population will be living in the cities. This will create problems for humanity. We need to take urgent action to make the cities more sustainable. Through this project, our students will work in groups from different schools and different countries and will discuss the problems, look for solutions, and design sustainable smart future cities using several web 2.0 tools, CospacesEDU and Microbit .