(2) 2-liter clear plastic pop bottles (empty and clean)
duct tape that will connect the (2) 2-liter bottles together.You need to shake the bottle around so it makes a water tornado.
Feedback/Feedforward: I like the way that Max did a very good diagram of how a tornado works.
Next time you can talk what's the science behind it.
Evaluation:Next time Max can talk more about how the water tornado works and how to make it in water.