Abstract: This study aims to describe the implementation of nature-based learning in fostering environmental awareness among young children at PAUD Alam Kebun Cengkeh. Fostering a sense of care for the environment from an early age is important as an effort to develop children’s habits of recognizing, protecting, and caring for their surrounding environment. The identified issue concerns the importance of developing environmental awareness and habits among children aged 4–5 years in maintaining cleanliness and environmental sustainability through learning experiences that are appropriate to children’s characteristics. Nature-based learning provides opportunities for children to learn directly through interaction with the environment, making learning more concrete and meaningful. This study employed a qualitative method with a case study approach. Data were collected through participant observation, semi-structured interviews, and documentation. The data were analyzed interactively through the stages of data reduction, data display, conclusion drawing, and verification. The research subjects consisted of 10 children aged 4–5 years and 2 teachers at PAUD Alam Kebun Cengkeh. The results showed that the implementation of nature-based learning can foster children’s environmental awareness through activities that directly involve them in recognizing, protecting, and caring for the environment. The children demonstrated positive behaviors, such as disposing of waste properly, maintaining cleanliness, caring for plants, and showing concern for living things in their surroundings. Habituation and teachers’ role modeling also supported the development of environmentally caring behavior among children.