Like others have said, it really is a simple little gadget, but tons of fun. From ages 3 to 43, you just can't stop playing around with the setup. Spinning it at different speeds, getting the water rotating sideways then tipping it up, and watching the size and shape of the resulting whirlpool effect.
A couple of notes:
Tried playing around with 20oz bottles first, worked for creating the whirlpool, but the openings are slightly different and could not get a good seal so there were water leaks.
Used plumber's teflon tape when putting it on two 2-liter bottles and that worked like a charm. Filled it with about a tablespoon of multicolored glitter. About half of it floats and half sinks. Then added some red food coloring to get a rich red color.
Now flip it up and give it a good few seconds of swirl! It's great to watch the whirlpool form, and watch the floating glitter oscillate up and down the funnel as it tries to decide whether buoyancy or gravity wins!
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I bought this for my son's Science Project on Tornados. It worked like a charm in creating a "tornado" in a bottle. No leakage and was easy to assemble! Makes a pretty cool visual for kids!
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I bought this for my nephew for his birthday. He is very fascinated with tornados so he loved this thing. I got 2 of them so that when he comes to visit he has 1 here. I read on another site to put sparkles and little houses ffrom monopoly in there or small farm animals he did that when he got home that night. Very fun toy for a child interested in tornados.
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My 6 yr old is obscessed with tornadoes, and this gadget hooked between 2 coke bottles is the source for endless entertainment.
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I was looking for one of these "tornado"tubes for my son who is autistic. There was a "tornado" in his class at school, that he just loves to play with, so we wanted one for home. It really captures his attention, and he will play with it for a long period of time. I recieved it within just a few days of placing my order.
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