Preschool Science - thunderstorm in a cup -Fill the cup half full of water (sky) Add shaving cream (clouds) few drops food coloring (water droplets). Explain as the cloud gets full and heavy the water starts to fall from the sky as rain. concept of lightning by explaining the frozen water in the cloud bumps into each other and causes an electrical charge. Bent paperclips represent lightning.
1.Fill a vase (glass water bottles look cool too!) about 2/3 full with oil. 2.Add water until the vase only has 1-2 inches of air space left at the top. 3.Add 5 drops of food coloring. 4.Add Alka Seltzer (or the store brand version), 1/4 tablet at a time. When the bubbles slow down, add another 1/4 tablet. 5.Experiment with any other additions you like.