5 Pcs Tornado in A Bottle, Tornado Tube Bottle Connector,Plastic Vortex Connector Cyclone Tube for Scientific Experiment and Test (5 Colors)

Specifications: - Material: Plastic - Size: 1.3 x 1.9 inch - Color: Purple, blue, red, green,yellow - Weight:Each 13g Packaging includes - 5x Tornado connectors - Good educational and fun experiment and activity for school classes, homeschoolers, scouts and any other group, stimulating kids interest to physics and study. - Create a tornado from plastic bottles, water and a colorful plastic connecting tube. - Great educational toy for your kids, Perfect Christmas Gift / Birthday Gift. - You have to take the food-security ring off of your bottles to get these to catch the threads.