This is a very simple science experiment, where you take 2 bottles, preferably 2 liter, and connect them together to form a drain, therefor when spun creates a majestic TORNADO IN A BOTTLE!!! Actually it is a whirlpool, but you get the point.
I bought my Tornado Tube connector off Amazon, but you can get one here - http://www.ebay.com/itm/TORNADO-TUBE-80788-TEDCO-SCIENCE-TOYS-Connect-2-Soda-Bottles-for-Tornado-/351772271681?hash=item51e742e441:g:D3sAAOSwYIxX~9SI

ALSO FOUND THEM AT HOBBY LOBBY!

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How to make a tornado in a bottle
Tornado In a bottle
Science
Experiment
School Approved