Integrate STEM in your classroom and learn about ecosystems with Build a Self-Contained Ecosystem STEM Plant Observation!Students learn about the water cycle and small ecosystems, and then build one themselves. They place seeds in a self-contained ecosystem and watch it grow over 3 weeks. Each week, students can write down observations as the plant grows!This activity helps students develop observational learning skills by watching and writing about their seed growing into a plant. Seed and Plan