Adult Supervision Required...
Empty soda or water bottle
1. Fill a bottle 3/4 full with vegetable oil. A clear bottle will work best.
2. Fill a plastic cup with water and add a few drops of food coloring. Stir.
3. Add the colored water to the bottle with the oil, and screw the lid on tight.
4. Turn the bottle sideways, and watch as the color moves through the oil in funny shapes and blobs.