Our final design has 3 parallel planes of action: 1) the fan, 2) the multi-headed bubble wand, and 3) the string/straw bubble maker. When user1 blows onto his/her conductive tape, it completes the circuit. This, in turn, publishes an event to the web - one which the second particle is subscribed to.
Upon reading the published event, the second particle powers both the fan & the DC motor attached. The DC motor dips the bubble wands into the solution, which is used by the wind from the fan to create bubbles (and vice versa when user2 blows on theirs).
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