The ECHO project seeks to boost child participation and child-led advocacy by engaging young people up to 18y.o. in transnational and local activities to become spokespersons for their peers in discussions about the European Child Guarantee (ECG). ECHO also builds knowledge on the ECG through child-centred research on the challenges of children in conditions of social exclusion, and in so doing strengthens the partners’ capacity to organize advocacy on the topic, including at transnational level