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this is a very simple tornado. for this you require two 1.5 litres bottles and a twin
lid. this lid has got a screw on both the ends and you can fix two bottles on either
end. you can also take two lids with hole and place them back to back and tape them
together to make a twin lid. now take a twin lid and screw it on the top of the bottle
very tightly. take this assembly and screw it on the bottle filled with water. now you
would see that there are two bottles which are joined tightly together with a twin lid
and the lower bottle contains water. take this assembly and invert it and then give
it a rotary shake and you would be surprised to see the water in the top bottle swirl around
just like a vortex. the water swirls and comes down, flows down to the lower bottle. this
is just like a tornado in real life with two bottles and a twin lid you can make a very
beautiful tornado at home