Edu-Toys  Water Filtration Kit Water goes on quite a journey to reach our faucets safe and ready to drink Filtration is an important step in the process Introduce young scientists to filtration and build a simple filtration system 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