Science for Kids --> Water bottle fountain Materials: Empty water bottle balloon straw blu-tac (or similar) tray for catching the water (optional. You could always do it outside, in a bath, or near a sink)
Earth Day Experiment ~ Can You Undo Water Pollution? In this experiment the kids learned just how hard it is to undo water pollution. a bucket of clean water, some household trash, vegetable oil (to stand for toxic oil spills), tongs, and a strainer.