To maintain promotion of the “use less, waste less” culture in pre-primary education, the Child Education Centre for Teaching and Learning (CECTL), part of the Department of Childcare, Elderly and Community Services of the Hong Kong Institute of Vocational Education (Sha Tin), received support from the Environment and Conservation Fund and the Environmental Campaign Committee to roll out “Kids go green” project in 2016 -17. The project aimed at promoting the culture of “use less, waste less” across nursery schools and kindergartens in order to help children develop environmental awareness at an early stage and make “use less, waste less” a lifetime practice. The project mobilized parents and even the whole community to actively engage in waste reduction and recycling with a hope of shaping an environment-friendly culture as well as addressing the environmental crisis of Hong Kong. By taking part in training workshops for teaching professionals and sharing sessions, our teachers have reinforced the school-based culture of “use less, waste less”, refined the design of learning environment, and elevated the professional capacity of maintaining parents-school collaboration. With a package of innovative teaching materials, our teachers encouraged children to practice “use less, waste less” in daily life and become ambassadors of waste reduction. By accessing the “Kids go green Professional Teaching Network”, our teachers were able to share and exchange teaching experience of designing and implementing school-based 3R courses by which a culture of teaching “use less, waste less” concept was formed. On “Green Environment Day”, we worked alongside business leaders, government, and environmental groups to promote 3R concept across families, communities, and the whole society in order to arouse public awareness of environmental issues.