The children visited a park to observe nature, then painted what they saw when they returned to school. Their teachers asked them to imagine if the park, school, homes, city, and world were full of rubbish to explain the importance of personal cleanliness and a clean, green environment. However, the children found the park was not clean, so they all decided to work together to clean it. After cleaning, the children felt more green and clean. They also learned about the trees in the park. The children named their cleaned park "The park of Santa George".