Tornado Tube – Create a Tornado in a Bottle! Simple, hands-on science that swirls into fun! Just connect two 2-liter bottles with a Tornado Tube and give it a twist—watch as a mesmerizing vortex forms right before your eyes! This classic science activity demonstrates fluid dynamics and vortex motion in a fun and memorable way. Connects two 2-liter bottles to create a spinning tornado effect Teaches about vortex motion, air pressure, and water flow Comes in assorted colors Made in the USA Recommended for ages 6 and up Only sold in increments of 12 (case pack of 12) Perfect for science fairs, classrooms, and homeschoolers—turn ordinary bottles into an extraordinary science experiment!