Once water os "used" and goes down the drain as waste water, what happens to it? What do you really know about the water we drinl? And what are the properties of water found in ponds and streams? Through puzzles, mazes, and water testing, these three kits help students find out. Each kit includes a teacher's guide and reproducibles in .pdf format on a PC/Mac diskette and enough materials to perform at least 150 water tests.