For the PBL Inquiry, ‘How do we create a system to provide safe drinking water to all at a low cost?’ On 30th March, the students of Grade IV created their own water filter with the materials available in their immediate surroundings through a hands-on activity and tested it to analyze its efficiency when a problem situation was assigned to them. This activity was conducted in the class to help students understand the low-cost method of purification and interpret the function of different materials in their water filter. Their models were useful to successfully culminate their learning process!