Last night I wondered why have a blower AND a motor for a bubble machine when you can just use the blower. More of a proof of concept, but it is functional and blows bubbles. A good blower fan works well. I incorporated 9x5mm bearings, but they are not really needed.
10/16/18 - Not much use without a reservoir and something to hold the BubbleBlade. So I made one! Video of test: https://www.youtube.com/watch?v=lNxEEoE1OGY
Going to take it outside tomorrow and see what it does in front of the fog machine :)