Water Purification Kit Learn two different techniques of water filtration with this water purification kit! Three experiments take children through the steps of purifying water through filtration with gravel, sand, activated carbon and filter paper. One distillation experiment illustrates the concept of evaporation, the water cycle, and states of matter. This kit for making clean water contains gravel, sand, carbon, filter paper, and a multi-level filter device. You supply a few common household items like soil, cooking oil, clear plastic cups, tape, and coffee. Note: Performing the experiments in this kit produces filtered and distilled water, but it is not safe for human consumption. Drinking water must also be disinfected. However, you can use your cleaned water for plants, if you wish. Contents: 1 evaporating dish, 1 evaporating dish cover, 2 cups with 2 holes, 2 cups with 4 holes, 1 cup holder, 1 non-perforated cup, 1 pack activated carbon, 1 pack gravel, 1 pack sand, 10 filter papers, instructions with pictures in German