This was the fourth activity of the series. It was focussed on studying the largest mammal on earth ‘The Whale’. The purpose was to encourage children to explore the endangered existence of whales in the world’s oceans and in the process develop multiple perspectives to understand the interdependence in our eco-system and understand our responsibility towards maintaining this balance in nature. Students studied everything about whales; e.g. the different species of whales, the oceans where a certain species is found, the ideal conditions of survival for the mammal, it’s physical dimensions and body weight, the food that it eats, breeding period, the dangers to their existence in the form of illegal killing/ poaching and harpooning for their blubber and even meat in certain parts of the world. The most important part of this activity was when students researched about the exact number of whales alive, and the countries which have the least number of whales in their oceans. The students also learnt about international organisations such as ‘Sea Shephard’, ‘Green Peace’ and many more who are working to save whales in different parts of the world.  Students presented their learning through posters and world maps. They also made small podcasts to encourage people to save whales, and finally expressed their solidarity with the mammal through slogans, bar graphs and facts depicted on a marine wall. A feedback survey conducted on the entire participating group showed that all children empathise with whales and believe that killing them is wrong. It was a successful activity because all students through the lesson on whales have learnt that every single organism in the ecosystem has a role to play to support the balance in nature and the extinction of any one organism could affect the sustainability of a healthy ecosystem with rich species diversity.