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
