Tornado In A Bottle

Needed:

1- 16 oz clear plastic soda bottle with a cap (the rounder the bottom the better the tornado)
2 drops clear liquid dish detergent
1 tsp. glitter

Directions:

Fill the bottle with cold water. Add liquid dish detergent and glitter to the bottle. Screw on the cap tightly. Holding the bottle by the neck, turn it upside down. Quickly rotate your wrist several times in a clockwise motion. When you stop rotating, a min-tornado will form inside the bottle. Using permanent markers, you can draw a picture of a city or landscape around the bottom of the plastic bottle. Add a few drops of blue food coloring to the bottle to create a sky effect.