About This

• Suitable for most popular bottles
• Made of durable plastic. Stripe on connector surface for easy rotation
• Scientific Exploration - Good for kids to explore some of the scientific properties of air and water, and to stimulate their interest to physics, dynamics and potential energy
• How to use - Use a connector to connect a bottle with about 3/4 of water and an empty bottle, shake the bottle 3-4 times horizontally, then you will see that the vortex in the bottle is rotating. 2-liter bottles are recommended. If you want to create a colored tornado, you can add pigment to the water
• Package includes 25 pieces connector, good for sharing with friends or classroom use