In this presentation I will outline some ethical dimensions found in children’s meaning-making processes when studying environmental and sustainability issues. The presentation is based on my doctoral thesis where school children aged 10-12 took part in two empirical studies. The first study was a comprehensive questionnaire including open ended questions. The second study was a case study in one grade 6 class for one school semester. Both studies focused how children in these ages understood, valued and made meaning in environmental and sustainability issues. The overall methodology for my thesis was mixed methods. The methods used when analyzing were in the first study thematic content analysis for the open questions, and statistics on both a descriptive level and a relational level. In the second study, the case study, a number of empirical sources were used in order to analyze children’s meaning-making processes over time in two different school contexts, one more practical outdoors and one indoors, more digital. The theoretical frameworks used in these studies are John Dewey’s theories on aesthetic experience and learning, and also Martha Nussbaum’s theories regarding emotions and values. My results reveal that there are different kinds of ethical dimensions in children’s understanding, valuing and actions. One dimension concerns aspects of environmental ethics when children express how they value nature. Other dimensions concern how children form values from emotional responses. Finally, I will discuss what might be learnt in ethics when environmental and sustainability issues are focused in educational activities.