Who?
Charities or other organisations with a specific remit such as sustainability, or Non-Governmental organisations that coordinate activity under a specific topic e.g. human rights.
Some ways you might involve them:
Examples
Charity loaning digital devices (Belgium) - https://repairshare.be/deel-it/projectfiche-deel-it/
Advocacy training for parents who have children with Special Educational Needs (Hungary) - https://lepjunkhogylephessenek.hu/?fbclid=IwAR1yjl5RA1jDAmy4-Ydy94zeFQymMdn5Sg7n9tE20B7sPxCjcnjWmkIGQic
Children’s rights organisation (Slovenia) - https://www.zpms.si/o-zpms/