South Dorchester Public School Grade 5 pupils Owen Gillet, left, Ben Aumont and Kevin Guikema teamed up to make homemade water filters during an Education Week activity in teacher Andrea Powers’ class on Wednesday, May 7. Owen was scooping stones into the filter and later the boys poured red coloured dyed water through their filter to try to purify it. Other “dirty” water that was filtered by the pupils came from Kettle Creek and from a muddy area behind the school. The red coloured water came from a previous project when Ms. Powers’ pupils dyed some paper red. The activity was part of the conservation of energy unit the pupils were studying.