In October we held a car-free day in the street. The turnout was impressive: people brought tables into the street, offered food and ran workshops

Serpentina was born in Porto to reclaim something that seems simple but has become rare: children playing in the street. The movement, created by Maria João Macedo and Patrícia Costa, has been transforming small urban spaces into new ways of socialising in a city dominated by cars. Listen to Mobi Boom here.