The New Ecological Paradigm (NEP) scale has been extensively used to measure adults’ environmental attitudes. However, it has only recently been adapted for use with children. This paper presents a Spanish version of the NEP Scale for Children, examines children’s ecological beliefs according to socio-demographic variables as well as the relationship between children’s ecological beliefs and pro-environmental behavior. Exploratory factor analysis was conducted, followed by confirmatory factor analysis. In addition, the instrument’s internal consistency was studied and links between environmental attitudes, age, and ecological behavior in children were examined through correlation analyses. The results show that children’s ecological worldviews can be described by a dimension called “overall ecocentrism”. Analysis of variance demonstrated that children from rural areas exhibit a more ecocentric worldview than those from urban areas. The results also denote gender differences.