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      Science

      Vortex Valve

      NZ $2.90 incl GST

      The vortex valve is a designed to demonstrate the how a tornado swirls. Great for those who have a fascination with water

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      Science

      Description

      The vortex valve is a designed to demonstrate the how a tornado swirls. Connects two large soft drink bottles. When one is half filled with water, with a flick of the wrist a tornado in a bottle is created. Scientific fun. Great for those who have a fascination with water

      Drink bottles not included. Colours may vary. For 3 years plus.

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