Since the students have worked on the WERWORLD Teaching Guide activity “Ecological Corners”, they have already learned about how are they able to transform their schools into a place with different of sustainable or ecological corners, focusing on recycling and learning how to reduce CO2 emissions, as well as the importance of plants. In this activity, the students will have to relate in which way a series of objects may contribute to the care of the planet: recycling, reducing CO2 emissions or growing plants. All of these measurements may be adopted in their classrooms.