Is there public funding available that might support the projects?

For NGOs: If you have a good idea for a project but can't implement it because you lack the necessary funds, check public funds and see if they apply to you. Many government bodies and public charities offer funding to support youth work.

For festivals: If you have experience with hosting NGOs and know where they might get access to funding, tell them.

The EU lists some funding options for NGOs here:

This project has been funded with support from the European Commission. The author is solely responsible for this publication (communication) and the Commission accepts no responsibility for any use may be made of the information contained therein. In compliance of the new GDPR framework, please note that the Partnership will only process your personal data in the sole interest and purpose of the project and without any prejudice to your rights.