In a time where the urbanization is accompanied by deforestation and habitats destruction, actions of environmental analysis and awareness are fundamental. One way to develop this awareness is investing in the children, future environmental managers, working on their perception about the person-environment relationship. The aim of this study was to evaluate the perception and knowledge about the "Environment" or "Nature" in two groups of students from public schools of the Municipality of Serra Talhada ( State of Pernambuco hinterland) and, through dynamic methods, to work environmental awareness using the theme "The importance of trees in everyday life." Severe pruning of the trees by the population is common in this municipality. In the analysis previous to the application of the methodology, less than 3% of students of the visited schools expressed actions of anthropic impacts on trees in their drawings. It was found that environmental education in the assessed schools was not a constant practice. After the application of lectures, the staging of an educational play and a thematic song, a higher attention of the children on this issue was observed. The present study shows that little and simple educational actions, contextualized to local realities, can exalt a more critical view of the children, being also required a continued action in the schools of the region, so that educators can act actively in search for the best strategies for conservation and preservation of Brazilian semiarid ecosystems.