The topic of this paper focuses on the education and upbringing of children for a sustainable future, with a particular emphasis on developing their environmental awareness and understanding of sustainable development issues. In the context of increasingly prevalent environmental challenges, such as climate change, environmental pollution, and biodiversity loss, education for sustainable development becomes fundamental in shaping future generations. The preschool period is crucial, as it forms the foundation for the development of children's attitudes, values, and behaviors in the future. The paper is structured into theoretical, research, and project sections. The theoretical section comprises six chapters: the first chapter discusses the importance of environmental awareness and the integration of environmental topics into the kindergarten curriculum; the second chapter emphasizes the significance of a comprehensive approach within preschool institutions' curricula; the third chapter presents approaches and methods for explaining the concept of climate change to children in a simple way; the fourth chapter analyzes the role of educators in education for a sustainable future; the fifth chapter examines the skills children need for responsible behavior; and the sixth chapter focuses on the implementation of project-based learning in preschool education. The research section of the paper includes a quantitative study based on the results of the quiz "Let's Protect Our Planet," and a qualitative study analyzing children's responses to open-ended questions about environmental conservation. The final section presents the project "Little Ecologists – Future Guardians of Planet Earth," conducted at the Ivankovo kindergarten, which, through various activities and incentives, fosters environmental awareness in children. The paper concludes with a summary of key insights and research findings.