The following is a quick plan for a different type of buble generator
though it is not one for producing clouds of bubbles...


Using a wind rotated vanes, have it dip a large ring up and down into
and out of a dish of fluid..

                                                            <---------
                    ,----.                                      Wind
                    |  | |      ring         |              <---------
                    |  | ------------------- |
       Hinge   ---> *  +---------------------+
                                     dish of fluid
                                     

  Anthony Thyssen ( System Programmer )    http://www.cit.gu.edu.au/~anthony/
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   Never play leap frog with a Unicorn    -- Grand Wizard `Murphy'
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     PGP Public Key available -- finger -l anthony@lyrch.cit.gu.edu.au