Empower 8–12-year-olds in Cyprus and Greece to act as EU-climate citizens: run a school water audit, use STEAM data to deliberate and vote, and implement at least 4 low-cost water-saving measures per school. Produce an EN/EL micro-curriculum, audit toolkit and OER videos, achieving learning gains and a model other schools can replicate. This will embed routines, fix leaks and strengthen inclusion and democratic participation through student assemblies, role rotation and safe, privacy-safe media.