Color Mixing - Learn about absorption and how water moves with the dynamic "Walking Water Science Experiment for Kids" via Coffee Cups and Crayons
create your own ecosystem- just set them in front of a sunny window so that photosynthesis can happen, setting in motion the cycle of life. The water will evaporate to the top to rain down on the soil, helping the grass to grow and the dead leaves to decompose, which feed the insects. There will be plenty of oxygen from the plants, and the algae that will grow will feed the fish and snails.
Weather - water cycle liter soda bottle cut in half. Put about an inch and a half of warm water (w blue food coloring) in the bottom. Invert the top of the bottle with the lid on and fill with ice. Watch the water condensate and watch it "rain")
This tornado in a jar would be a great visual for a science lesson. It is easy to make and interactive. The students can shake the jar in a circle to get the tornado formation and see its shape and how it moves. Adding "Elijah" to the jar?