This is hands on scientific fun. The vortex valve is a designed to demonstrate how a tornado swirls. Use it to connect two large soft drink bottles. When one is half filled with water, flick your wrist and a tornado in a bottle is created. Now supplied with two ‘0-ring’ seals to protect against leakage.

Bottle not included.

Price is for Individual Items 

Age Recommendation: 5 years +

Dimensions: 3.5cm x 3.5cm x 5cm