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well, you can make a tornado in a plastic box. all you need is a plastic box and a plastic
bottle with which you make a spinner. you also need a bicycle spoke. place a piece of
plastic CD on bicycle spoke to make a spinner. make a hole in the lid of the plastic box
and push the cycle spoke in it. this is the red lid of the bottle affixed with a cycle
spoke nut. now screw on the bicycle spoke with a plastic spinner in it. now take an
old plastic bottle, cut a dozen petals and twist them to convert these petals into blades
with a curvature. then you screw on this propeller on the bottle lid. now place this lid in the
bottle which is half full with the water. now place this whole assembly under a ceiling
fan. and as soon as you do that this spinner will start to rotate and this would produce
a small well inside the box. see the closeup of this. as the spinner rotates it pull in
the water in the form of a well. you see a very beautiful parabolic well. its a great
sight to behold. this is because of the water spinning which forms a tornado and a well. as the fan stops the tornado disappears.