Tornadoes in A Bottle, 20 Pcs Plastic Tornado Bottle Connector Vortex Connector Cyclone Tube for Scientific Experiment, 5 Colors

These make building tornadoes easy. My kids love making their own tornadoes adding in glitter, food coloring and random small objects. Be warned the hole between the bottles is small so be careful for clogs.

They worked to create a tornado and the kids loved it. I did notice they do not work with short capped water bottles, like Poland springs and similar styles. The tubes worked with smart water bottles and soda bottles. I wanted to share that because we don’t drink soda and got lucky with having hosted a holiday function and had the leftover bottles.

These worked great once we got them screwed on extremely tight. Otherwise they will leak. But if you need a bunch of them for a class, the price was good. I just had a mess to clean up after several of them leaked all ove the table.s

Perfect little science fair goody bag item! My kids didn’t stop playing with it all day

These were perfect for my preschool. It fit on your standard bottle opening. We were even able to make it work with two smaller bottles and that was easier for the little ones to handle! Also hasn’t leaked once!

"Resold" these for 8 year old's economic's fair. Sold out instantly. KEY POINT: They do leak so wrap bottles with Teflon tape and remove seal ring from bottle. Simple fix for the price point.

They are great. They work just as I hoped. My daughter's students will enjoy making Tornados in a bottle.

My class enjoyed making tornadoes.

Works well, my kids have a lot fun making water tornadoes

Who doesn’t like to build and watch a tornado in a bottle