Patent ID: 7780497

Claim:
A method of generating a bubble that encloses a smaller bubble inside, comprising: providing at least two sets of bubble rings, each set having a first bubble ring that is positioned inside a second larger bubble ring, the first bubble ring spaced apart from the second bubble ring; coupling the the sets of bubble rings for movement past an air opening which is coupled to an air generator; and moving the first and second bubble rings of a first set of bubble rings together in a lateral manner past the air opening where: (i) a first portion of the second bubble ring first passes in front of the air opening; (ii) the first bubble ring completely passes in front of the air opening while a second portion of the second bubble ring is also passing in front of the air opening; and (iii) a third portion of the second bubble ring passes in front of an air opening; and wherein only one set of bubble rings is exposed to the air opening at any given time.