4M Solar Science Kit with Clean Water Science Kit</br></br>Product Description</br></br>Purify water or cook an egg using foiled cardboard and the sun;Construction supplies and complete instructions included;Learn the science of cleaning and reusing dirty water by conducting interesting water purification experiments;Clean Water Science kit contains a plastic filter system?? active carbon?? sand?? rock?? filter paper and instructions;Just add a water glass; this personal desalination kit demonstrates the scientific way to extract salt from sea water</br><br/>http://www.amazon.com/gp/product/B01MYSKIKA