Concerns about environmental sustainability are constantly in the news as global warming, fossil fuels, and pollutants increasingly endanger habitats worldwide. What once were uncommon extreme environmental events have become commonplace--unseasonal intense heat, year-round drought, raging wildfires, rising sea levels, severe storms, massive flooding, toxins poisoning the atmosphere, plastic waste choking oceans, and oil leaks endangering ecosystems. Although young children don't fully understand the complexities or implications of such crises, they generally are aware that the environment is at risk. To capitalize on this awareness and concern, teachers can intentionally design issue-oriented experiential lessons or units of study which make content about environmental sustainability accessible while also cultivating dispositions for civic responsibility, agency, and action to restore and care for the earth. Children at early ages can grapple with developmentally appropriate issues to establish a foundation for becoming active global citizens living as agents of change. In this article, the authors describe the Great Barrier Reef Storypath unit that develops knowledge about ocean ecosystems, dispositions for personal stewardship, and skills to participate in protecting and sustaining the environment.