Water filters

Boys started planning their water filters on Monday this week. They are going to construct, test and modify this Monday coming. All boys have been asked to collect the materials they need from home over this week. The main body of the water filter has to be a 1.25L and then boys have been given choices about what materials they are going to collect to use along with their bottle. Please don't forget boys as everything must be constructed at school on Monday. Good luck!