You will need:

* Tornado Tube

* 2 Plastic Soda Bottles (2L)

* Water

Step 1: Fill a plastic soda bottle about two thirds full of water.

Step 2: Screw one end of a tornado tube onto the bottle.

Make sure the end fits tightly. Then screw an empty

bottle into the other end of the tube. Make sure it also

is screwed tightly.

Step 3: Turn the bottle with the water in it upside down.

Hold on to the tornado tube. Quickly move the bottles

in five or six circles so the water inside swirls. Look

at the water draining from one bottle into the other.

Write down your observations on a piece of paper.