Water Filtration Kit Water goes on quite a journey to reach our faucets safe and ready to drink. One of the many important steps in the process is filtration. Your water filtration kit includes assorted filtration media to sift contaminants out of water. This kit introduces young scientists to the filtration process by building a simple filtration system and more. Includes: 4 Chamber Filtration Assembly, Filter media: Gravel, Sand, Active Carbon, 100mm paper filter, 45mm paper filter, Measuring Cup. Another great learning toy from Elenco.