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Vortex Valve
NZ $2.80
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Vortex Valve

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.