basicly a cloud is a pipe with a smaller pipe attached. the way it works is air is blown in to the larger pipe ad randomly shoots bb's out the barrel. i honestly is easyer if you look it up.
i cant explain a vortex, though it is very simple.
you build it mostly with you brain and partly with your hands. it would cost about $15 to make a cloud and a little more to make a vortex.
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