A unique device for demonstrating tornadoes in your classroom! Simply screw device on plastic soda bottle two-thirds full of water, attach empty plastic soda bottle to other end and swirl upper bottle briefly. Bottles not included.
Features
Sold as an Each
Simple, fun way to demonstrate twisting tornadoes to your child
Easily attaches to a standard soda bottle for hours of fun
Great for science projects and at home experiments
Children of all ages will be entertained by creating their own tornado